NetBSD/gnu/dist/postfix/HISTORY

In addition to the names listed below, the following people provided
useful inputs on many occasions: Paul D. Robertson, Simon J. Mudd.
Apologies for any names omitted.

19980105

	The compiled-in default value for resolve_smtp_sender was
	wrong (from the days that it was a boolean), causing smtpd
	to dump core when the variable was not set in main.cf.

	The INSTALL instructions now have separate sections for
	the three basic ways of running vmailer.

	The INSTALL instructions now have discusses how to deal
	with chrooted processes.

	Ported to RedHat 5.0. My, these people have re-organized
	their include files quite a bit, haven't they.

19980106

	On RedHat Linux 4.2/5.0, when a FIFO listener opens the
	FIFO with mode O_RDONLY, the FIFO remains forever readable
	after the writer has closed it.  Workaround: open the FIFO
	mode O_RDWR.

	Test program: util/fifo_rdonly_bug.c

	Unfortunately, the above fix triggers a bug on BSD/OS 3.1
	where opening the FIFO mode O_RDWR causes select() to claim
	that the FIFO is readable even before any data is written
	to it, causing read() to block or to fail.

	Test program:  util/fifo_rdwr_bug.c

	printfck (check arguments of printf-like function calls)
	found a missing argument in local/command.c

	Miscellaneous Makefile cleanups that I didn't finish before
	the first alpha release.

19980107

	Sometimes the DNS will claim that a domain does not exist,
	when in fact it does. Thus, it is a bad idea to reject mail
	from apparently non-existent domains. I have changed the
	smtpd so that it produces a soft error responses when a
	resolve_smtp_sender test fails with HOST_NOT_FOUND.  Note:
	by default, this test is still disabled.

	The DB and DBM read routines will now automagically figure
	out if (key, value) pairs were written including a terminating
	null byte or not. The DB and DBM write routines will use
	this result to determine how to write, and will fall back
	to per-system defaults otherwise.

	Renamed the README to MUSINGS, and wrote up a README that
	reflects the current status of the software.

	Added -d (don't disconnect) and -c (show running counter)
	option to te smtp-source test program. These tools are
	great torture tests for the mail software, and for the
	system that it runs on.

	Turned down the process_limit parameter (# of parallel smtp
	clients or servers) to avoid unpleasant surprises. You can
	crank up the process_limit parameter in main.cf.

19980111

	Feature: when run by the superuser, mailq now shows the
	mail queue even when the mail system is down. To this end,
	mailq (sendmail -bp) runs the showq program directly instead
	of connecting to the UNIX-domain service socket, and drops
	privileges etc.  as usual.

19980119

	Bugfix: Edwin Kremer spotted an oversight in the negated
	host matching code (for name or address patterns prefixed
	by !).

	Bugfix: upon receipt of a SIGHUP signal, the master now
	disconnects from its child processes, so that the current
	generation of child processes commits suicide, and so that
	the next generation of child processes will use the new
	configuration settings.

	Bugfix: the smtp server now skips the sender DNS domain
	lookup test for foo@[address]

	Bugfix: don't append the local domain to foo@[address]

19980120

	Bugfix: old low-priority bug in some list walk code that
	caused the master to drop core when a service was turned
	off in master.cf.

	Robustness: the mail system should be able to start up and
	to accept local postings even while the naming service is
	down.  For this reason, the mail system no longer uses
	gethostbyname() to look up its own machine name.  Sites
	that use short hostnames will have to specify their FQDN
	in main.cf (this will eventually be done by the system
	installation/configuration procedure). Should the config
	language support backticks so one can say `domainname`? What
	about $name stuff between the backtics?

	Security: the master now creates FIFOs and UNIX-domain
	sockets as the mail owner instead of as root, for better
	protection against subverted mail systems. chmod() is
	susceptible to race conditions. fchmod(), although safer,
	often does not work on sockets.

	Portability: anticipate that all major UNIXes will create
	UNIX-domain sockets with permissions modified by the process
	umask (required by POSIX). For this reason, we always
	chmod() UNIX-domain sockets, unless the system allows us
	to use the safer fchmod() instead.

	Portability: the semi-resident servers now properly handle
	EWOULDBLOCK returns from accept()  in addition to EGAIN
	(on some systems, EAGAIN and EWOULDBLOCK have different
	values).

	Bugfix: the semi-resident servers now properly handle EINTR
	returns From accept().

	Bugfix: Edwin Kremer found that mynetworks() would compute
	(32 - mask) instead of mask.

19980121

	Feature: /etc/vmailer/relocated is used by the local delivery
	program and specifies what mail should be bounced with a
	"user has moved to XXX" message. The main.cf configuration
	parameter is "relocated_maps".  Just like the "virtual_maps"
	config parameter, this feature is off by default, and the
	parameter can have values such as "files" or "files, nis"
	(on hosts equipped with NIS).

19980123

	Cleanup: virtual domain support moved from the queue manager
	to the resolve service, where it belongs.

	Feature: /etc/vmailer/canonical is used by the rewrite
	service for all addresses, and maps a canonical address
	(user@domain) to another address.  Typical use is to generate
	Firstname.Lastname@domain addresses, or to clean up dirty
	addresses from non-RFC 822 mail systems. The main.cf
	configuration parameter is "canonical_maps".  Just like
	the "virtual_maps" config parameter, this feature is off
	by default, and the parameter can have values such as
	"files" or "files, nis" (on hosts equipped with NIS).

19980124

	HPUX10 port and many little fixes from Pieter Schoenmakers.

	Bugfix: isolated an old mysterious bug that could make the
	master deaf for new connections while no child process was
	running.  A typical result was that no pickup daemon would
	be started after the previous one had terminated voluntarily.

	Bugfix: the NIS lookup code did not mystrdup() the NIS map
	name and would access free()d memory.

19980125

	Bugfix: the vstream routines would sometimes ignore flushing
	errors. The error would still be reported by vstream_fclose()
	and vstream_ferror().

	Feature: time limit on delivery to shell commands.  Config
	parameter: command_time_limit. Default value: 100 sec. The
	idea is to prevent one bad .forward file or alias file
	entry from slowly using up all local delivery process slots.

19980126

	Code cleanup: in preparation for SMTP extensions such as
	SIZE, allow an extended SMTP command to have a variable
	number of options.

19980127

	Bugfix: moved canonical map lookups away from the rewriting
	module to the cleanup service, so that canonical map lookups
	do not interfere with address rewriting on behalf of other
	programs. Back to an older trivial-rewrite program version.

	Bugfix: moved virtual map lookups away from the resolver
	back to the queue manager, so that virtual domain lookup
	does not interfere with address resolution on behalf of
	other programs. Back to an older qmgr program version.

19980131

	Feature: integrated and adapted Guido van Rooij's SIZE
	option (RFC 1870), carefully avoiding potential problems
	due to overflow (by multiplying large numbers) or unsigned
	underflow (by subtracting numbers).

	Code cleanup: cleaned up the code that parses the server
	response to the HELO/EHLO command, so that we can more
	reliably recognize what options a server supports.

19980201

	Portability: integrated the IRIX 6 port by Oved Ben-Aroya.

	Portability: the software now figures out by itself if a
	server should open its FIFO read-write or read-only, to
	avoid getting stuck with a FIFO that stays readable forever.

	Bugfix: the cleanup service would terminate with a fatal
	vstream_fseek() error when the queue file was too large.

	Bugfix: the cleanup service could be killed by a signal
	when the queue file became too large.

19980203

	Portability: some systems have statfs(), some have statvfs(),
	and the relevant include files are in a different place on
	almost every system.

	Portability: the makedefs script now nukes the -O compiler
	flag when building on AIX with IBM's own compiler...

19980204

	Portability: HP-UX 9.x support by Pieter Schoenmakers.

	Portability: added SYSV-style ulimit() file size limit
	support for HP-UX 9.x.

	Portability: added some #includes that appeared to be
	missing according to the Digital UNIX cc compiler.

	Bugfix: sys_defs.h now correctly specifies NIS support for
	LINUX2, HPUX9 and HPUX10.

	Security: fixed a file descriptor leak in the local delivery
	agent that could give shell commands access to the VMailer
	IPC streams. This should not cause a vulnerability, given
	the design and implementation of the mailer, but it would
	be like asking for trouble.

	Bugfix: the sendmail -B (body type) option did not take a
	value.

19980205

	Bugfix (SUNOS5): should not have deleted the SVID_GETTOD
	definition from util/sys_defs.h.

	Bugfix (HPUX9): forgot to specify whether to use statfs()
	or statvfs().

	Bugfix (HPUX9): don't try to raise the file size ulimit.

	Bugfix (HPUX9): must specify file size limit in 512-blocks.

19980207

	Robustness: the master process now raises the file size
	limit when it is started with a limit that is less than
	VMailer's file size limit.  File: util/file_limit.c.

	Security: the dns lookup routines now screen all result
	names with valid_hostname(). Bad names are treated as
	transient errors.

	Feature: qmail compatibility: when the home_mailbox parameter
	is set, mail is delivered to ~/$home_mailbox instead of to
	/var[/spool]/mail/username.  This hopefully makes it easier
	to lure people away from qmail :-)

	Robustness: several testers by accident configured relayhost
	the same as myhostname. The programs now explicitly check
	for this mistake.

	Bugfix: deliver_request_read() would free unallocated memory
	when it received an incomplete delivery request from the
	queue manager.

	Robustness: local_destination_concurrency=1 prevents parallel
	delivery to the same user (with possibly disastrous effects
	when that user has an expensive pipeline in the .forward
	or procmail config file).  Each transport can have its own
	XXX_destination_concurrency parameter, to limit the number
	of simultaneous deliveries to the same destination.

19980208

	Robustness: added "slow open" mode, to gradually increase
	the number of simultaneous connections to the same site as
	long as delivery succeeds, and to gradually decrease the
	number of connections while delivery fails. Brad Knowles
	provided the inspiration to do this.

	This also solves the "thundering herd" problem (making a
	bunch of connections to a dead host when it was time to
	retry that host). Let's see when other mailers fix this.

	Feature: Added $smtpd_banner and $mail_version, for those
	who want to show the world what software version they are
	running.

	Bugfix: vmailer-script now properly labels each syslog
	entry.

19980210

	Portability: merged in NEXTSTEP 3 port from Pieter Schoenmakers

	Bugfix: the local delivery program now checks that a
	destination is a regular file before locking it.

19980211

	Robustness: the local delivery agent sets HOME, LOGNAME,
	and SHELL when delivering to a user shell command. PATH is
	always set, and TZ is passed through if it is set.

19980212

	Feature: mailq (sendmail -bp) now also lists the maildrop
	queue (with mail that hasn't been picked up yet).

19980213

	Feature: the smtpd now says: 502 HELP not implemented. This
	should impress the heck out of the competition :-)

19980214

	Feature: local delivery to configurable system-wide command
	(e.g.  procmail) avoids the need for per-user ~/.forward
	shell commands. Config parameter: mailbox_command.

19980215

	Performance: avoid running a shell when a command contains
	no shell magic characters or built-in shell commands. This
	speeds up delivery to all commands. File: util/exec_command.c.

	Bugfix: the local delivery agent, after reading EOF from
	a child process, now sends SIGKILL only when the child does
	not terminate within a limited amount of time. This avoids
	some problems with procmail.  File:  util/timed_wait.c.

19980217

	Portability: folded in NetInfo support from Pieter
	Schoenmakers.

19980218

	Feature: new vmlock command to run a command while keeping
	an exclusive lock on a mailbox.

	Feature: with "recipient_delimiter = +", mail for local
	address "user+foo" is delivered to "foo", with a "Delivered-To:
	user+foo@domain" message header. Files: qmgr/qmgr_message.c,
	local/recipient.c. This must be the cheapest feature.

19980219

	Code cleanup: moved error handling into functions that
	should always succeed (non_blocking(), close_on_exec()).

19980223

	Bugfix: null pointer bug in the cleanup program after
	processing a From: header with no mail address (or with
	only a comment).

19980226

	Robustness: now detects when getpwnam() returns a name that
	differs from the requested name.

	Feature: Added %p support to the vbuf_print formatting
	module.

	Code cleanup: revamped the alias/include/.forward loop
	detection and duplicate suppression code in the local
	delivery agent. This must be the fourth iteration, and
	again the code has been simplified.

19980228

	Robustness: don't treat anything starting with whitespace
	as a header record. Instead, explicitly test for leading
	whitespace where we permit it. Files: global/is_header.c,
	bounce/bounce_flush_service.c, local/delivered.c.

19980301

	Compatibility: the sendmail program now accepts the -N
	command-line option (delivery status notification) but
	ignores it entirely, just like many other sendmail options.

	Bugfix: dns_lookup.c was too conservative with buffer sizes
	and would incorrectly report "malformed name server reply".

19980302

	Bugfix: the local delivery agent was not null-byte clean.

19980307

	Feature: integrated Pieter Schoenmaker's code for transport
	lookup tables that list (transport, nexthop) by destination.

19980309

	Bugfix: delivery agents no longer rename corrupt queue
	files, because programs might fall over each other doing
	so. Instead, when a delivery agent detects queue file
	corruption, it chmods the queue file, simulates a soft
	error, and lets the queue manager take care of the problem.

	Bugfix: the SMTP server implemented VRFY incorrectly.

	Feature: first shot at a pipe mailer, which can be used to
	extend VMailer with external mail transports such as UUCP
	(provided that the remote site understands domain addressing,
	because VMailer version 1 does not rewrite addresses).

	Cleanup: extended the master/child interface so that the
	service name (from master.cf) is passed on to the child.
	The pipe mailer needs the service name so it can look up
	service-specific configuration parameters (privilege level,
	recipient limit, time limit, and so on).

19980310-12

	Cleanup: factored out the pipe_command() code, so it can
	be shared between pipe mailer and local delivery agent.

19980314

	Compatibility: the sendmail program now parses each
	command-line recipient as if it were an RFC 822 message
	header; some MUAs specify comma-separated recipients in a
	command-line argument; and some MUAs even specify "word
	word <address>" forms as command-line arguments.

19980315

	Bugfix: VMailer's queue processing randomization wasn't
	adequate for unloaded systems with small backlogs.

	Bugfix: smtpd now uses double-buffered stream I/O to prevent
	loss of input sent ahead of responses.

19980316

	Bugfix: the smtpd anti-relay code didn't treat all hosts
	listed in $mydestinations as local, so it would accept mail
	only for hosts listed in $relay_domains (default: my own
	domain).

	Bugfix: smtpd now replies with 502 when given an unknown
	command.

19980318

	Cleanup: resolve/rewrite clients now automatically disconnect
	after a configurable amount of idle time (ipc_idle).

19980322

	Tolerance: VRFY now permits user@domain, even though the
	RFC requires that special characters such as @ be escaped.

19980325

	Bugfix: a recipient delimiter of "-" could interfere with
	special addresses such as owner-xxx or double-bounce.

	Tolerance: the SMTP client now permits blank lines in SMTP
	server responses.

	Tolerance: the SMTP client now falls back to SMTP when it
	apparently mistook an SMTP server as ESMTP capable.

	Bugfix: eliminated strtok() calls in favor of mystrtok().
	Symptom: master.cf parsing would break if $inet_interfaces
	was more than one word.

19980328

	Bugfix: user->addr patterns in canonical and virtual tables
	matched only $myorigin, not hosts listed in $mydestination
	or addresses listed in $inet_interfaces.  The man pages
	were wrong too. File: global/addr_match.c.

19980401

	Robustness: FIFO file permissions now default to 0622.  On
	some systems, opening a FIFO read-only could deafen the
	pickup daemon.  Only the listener end (which is opened as
	root) needs read access anyway, so there should not be a
	loss of functionality by making FIFOs non-readable for
	non-mail processes.

19980402

	Compatibility: sendmail -I and -c options added.

19980403

	Feature: virtual lookups are now recursive. File:
	qmgr/qmgr_message.c

19980405

	Implemented sendmail -bs (stand-alone) mode. This mode runs
	as the user and therefore deposits into the maildrop queue.

19980406

	The pickup service now removes malformed maildrop files.

19980407

	The pickup service now guards against maildrop files with
	time stamps dated into the future.

19980408

	Bugfix: in the canonical and virtual maps, foo->address
	would match foo@$myorigin only. This has been fixed to also
	match hosts listed in main.cf:$mydestination and the
	addresses listed in main.cf:$inet_interfaces.

	Bugfix: added double buffering support to the VMailer SMTP
	server. This makes the SMTP server robust against SMTP
	clients that talk ahead of time, and should have been in
	there from day one.

19980409

	Bugfix: the VMailer SMTP client now recognizes its own
	hostname in the SMTP greeting banner only when that name
	appears as the first word on the first line.

19980410

	Feature: smtpd now logs the local queue ID along with the
	client name/address, and pickup now logs the local queue
	ID along with the message owner.

	Bugfix: still didn't do virtual/canonical lookups right
	(code used the non-case-folded key instead of the case
	folded one).

19980418

	Bugfix: the SMTP server did not flush the "250 OK queued
	as XXXX" message from the SMTP conversation history.

19980419

	Bugfix: qmgr would not notice that a malformed message has
	multiple senders, and would leak memory (Tom Ptacek).

19980421

	Portability: in the mantools scripts, the expr pattern no
	longer has ^ at the beginning, and the scripts now use the
	expand program instead of my own detab utility.

19980425

	NetBSD 1.x patch by Soren S. Jorvang.

19980511

	Feature: the SMTP server now logs the protocol (SMTP or
	ESMTP) as part of the Received: header.

	Feature: smtpd now logs the last command when a session is
	aborted due to timeout, unexpected EOF, or too many client
	errors.

19980514

	Bugfix: the queue manager did not update the counter for
	in-core message structures, so the in-core message limit
	had no effect. This can be bad when you have a large backlog
	with many messages eligible for delivery.

	Robustness: the queue manager now also limits the total
	number of in-core recipient structures, so that it won't
	use excessive amounts of memory on sites that have large
	mailing lists.

19980518

	Bugfix: the SMTP client did not notice that the DNS client
	received a truncated response. As a result, a backup MX
	host could incorrectly claim that it was the best MX host
	and declare a mailer loop.

	Added start_msg/stop_msg entries to the vmailer startup
	script, for easy installation.

	Cleanup: VMailer databases are now explicitly specified as
	type:name, for example, hash:/etc/aliases or nis:mail.aliases,
	instead of implicitly as "files", "nis" and so on. Test
	program:  util/dict_open.  This change allowed me to
	eliminate a lot of redundant code from mkmap_xxx.c, and
	from everything that does map lookups.

19980525

	Bugfix: local/dotforward.c compared the result of opening
	a user's ~/.forward against the wrong error value.

19980526

	Bugfix: the smtpd VRFY command could look at free()d memory.

	Robustness: the smtpd program had a fixed limit on the
	number of token structures.  The code now dynamically
	allocates token structures.

	Bugfix: the queue manager still used the deprecated parameter
	name xxx_deliver_concurrency for concurrency control, but
	the documentation talks about the preferred parameter name
	xxx_destination_concurrency.  Fix: try xxx_destination_concurrency
	first, then fall back to xxx_deliver_concurrency.

19980621-19980702

	Cleanup: the string read routines now report the last
	character read or VSTREAM_EOF. This change is necessary
	for the implementation of the long SMTP line bugfix.

	Bugfix: the smtp server exited the DATA command prematurely
	when the client sent long lines. Reason: the smtp server
	did not remember that it broke long lines, so that '.'
	could appear to be the first character on a line when in
	fact it wasn't.

	Bugfix: the queue manager made lots of stupid errors while
	reading $qmgr_message_recipient_limit chunks of recipients
	from a queue file. This code has been restructured.

19980706

	Performance: the cleanup program now always adds return-receipt
	and errors-to records to a queue file, so that the queue
	manager does not have to plow through huge lists of
	recipients.

	Robustness: the initial destination concurrency now defaults
	to 2, so that one bad message or one bad connection does
	not stop all mail to a site. The configuration parameter
	is called initial_destination_concurrency.

	Performance: the per-message recipient limit is now enforced
	by the queue manager instead of by the transport. Thus, a
	large list of recipients for the same site is now mapped
	onto several delivery requests which can be handled in
	parallel, instead of being mapped onto one delivery request
	that is sent to limited numbers of recipients, one group
	after the other.

19980707

	Cleanup: the queue manager now does an additional recipient
	sort after the recipients have been resolved, so that the
	code can do better aggregation of recipients by next hop
	destination.

	Feature: lines in the master.cf file can now be continued
	in the same manner as lines in the main.cf file, i.e. by
	starting the next line with whitespace.

	Feature: the smtp client now warns that a message may be
	delivered multiple times when the response to "." is not
	received (the problem described in RFC 1047).

	Cleanup: when the queue manager changes its little mind
	after contacting a delivery agent (for example, it decides
	to skip the host because a transport or host goes bad),
	the delivery agent no longer complains about premature EOF.
	File: global/deliver_request.c

19980709

	Bugfix: when breaking long lines, the SMTP client did not
	escape leading dots in secondary etc. line fragments.  Fix:
	don't break lines. This change makes VMailer line-length
	transparent.  Files: global/smtp_stream.c, smtp/smtp_proto.c.

19980712

	Cleanup: the queue manager to deliver agent protocol now
	distinguishes between domain-specific soft errors and
	recipient-specific soft errors.  Result: many soft errors
	with SMTP delivery no longer affect other mail the same
	domain.

19980713

	Feature: the file modification time stamp of deferred queue
	files is set to the nearest wakeup time of their recipient
	hosts, or if delivery was deferred due to a non-host problem,
	the time stamp is set into the future by the configurable
	minimal backoff time.

	Bugfix: the SMTP client and the MAILQ command would report
	as message size the total queue file size. That would
	grossly overestimate the size of a message with many
	recipients.

	Bugfix: the 19980709 fix screwed up locally-posted mail
	that didn't end in newline.

19980714

	Robustness: the makedefs script now defaults to no optimization
	when compiling for purify.

19980715

	Robustness: the makedefs script now defaults to no optimization
	when compiling with gcc 2.8, until this compiler is known
	to be OK.

	Workaround: when sending multiple messages over the same
	SMTP connection, some SMTP servers need an RSET command
	before the second etc. MAIL FROM command. The VMailer SMTP
	client now sends a redundant RSET command just in case.

	The queue manager now logs explicitly when delivery is
	deferred because of a "dead" message transport.

19980716

	Feature: mailq and mail bounces now finally report why mail
	was deferred (the reason was logged to the syslog file
	only).  Changes were made to the bounce service (generalized
	to be usable for defer logs), showq service (to show reasons)
	and the queue manager.

	As a result the defer directory (with one log per deferred
	message) may contain many files; also, this directory is
	accessed each time a message is let into the active queue,
	in order to delete its old defer log. This means that hashed
	directories are now a must.

19980718-20

	Feature: configurable timeout for establishing smtp
	connections.  Parameter:  smtp_connect_timeout (default 0,
	which means use the timeout as wired into the kernel).
	Inspired by code from Lamont Jones. For a clean but far
	from trivial implementation, see util/timed_connect.c

	Cleaned up the interfaces that implement read/write deadlines.
	Instead of returning -2, the routines now set errno to
	ETIMEDOUT; the readable/writable tests are now separate.

19980722

	Feature: the default indexed file type (hash, btree, dbm)
	is now configurable with the "database_type" parameter.
	The default value for this parameter is system specific.

	Feature: selectively turn on verbose logging for hosts that
	match the patterns specified via the "debug_peer_list"
	config parameter.  Syntax is like the "bad_smtp_clients"
	parameter (see global/peer_list.c). The verbose logging
	level is specified with "debug_peer_level" (default 2).

	Security: the local delivery agent no longer delivers to
	files that have execute permission enabled.

19980723

	Workarounds for Solaris 2.x UNIX-domain sockets: they lose
	data when you close them immediately after writing to them.
	This could screw up the delivery agent to queue manager
	protocol.

19980724

	Cleanup: spent most of the day cleaning up queue manager
	code that defers mail when a site or transport dies, and
	fixed a few obscure problems in the process.

19980726

	Feature: the admin can now configure what classes of problems
	result in mail to the postmaster. Configuration parameter:
	"notify_classes".  Default is backwards compatible: bounce,
	policy, protocol, resource, and software.

19980726-28

	Feature: the admin can now configure what smtp server access
	control restrictions must be applied, and in what order.
	Configuration parameters:  smtpd_client_restrictions,
	smtpd_helo_restrictions, smtpd_mail_restrictions and
	smtpd_rcpt_restrictions. Defaults are intended to be
	backwards compatible. The bad_senders and bad_clients lists
	are gone and have become db (dbm, nis, etc) maps. Files:
	smtpd/smtpd_check.c, config/main.cf.

19980729-31

	Feature: hashed queues. Rewrote parts of the mail queue
	API.  Configuration parameters: "hash_queue_names" specifies
	what queue directories will be hashed (default: the defer
	log directory), "hash_queue_depth" specifies the number of
	subdirectories used for hashing (default 2).

19980802

	Bugfix: the pipe mailer should expand command-line arguments
	with $recipient once for every recipient (producing one
	command-line argument per recipient), instead of replacing
	$recipient by of all recipients (i.e.  producing only one
	command-line argument).  This is required for compatibility
	with programs that expect to be run from sendmail, such as
	uux. Thanks to Ollivier Robert for helping me to get this
	right.

	Code cleanup: for the above, cleaned up the macro expansion
	code in dict.c and factored out the parsing into a separate
	module, mac_parse.c.

19980803

	"|command" and /file/name destinations in alias databases
	are now executed with the privileges of the database owner
	(unless root or vmailer).  Thus, with: "alias_maps =
	hash:/etc/aliases, hash:/home/majordomo/aliases", and with
	/home/majordomo/aliases* owned by the majordomo account,
	you no longer need the majordomo set-uid wrapper program,
	and you no longer need root privileges in order to install
	a new mailing list.

19980804

	Added support for the real-time blackhole list.  Example:
	"client_restrictions = permit_mynetworks, reject_maps_rbl"

	All SMTP server "reject" status codes are now configurable:
	unknown_client_reject_code, mynetworks_reject_code,
	invalid_hostname_reject_code, unknown_hostname_reject_code,
	unknown_address_reject_code, relay_domains_reject_code,
	access_map_reject_code, maps_rbl_reject_code. Default values
	are documented in the smtpd/smtpd_check.c man page.

19980806-8

	Code cleanup: after eye balling line-by line diffs, started
	deleting code that duplicated functionality because it was
	at the wrong abstraction level (smtp_trouble.c), moved
	functionality that was in the wrong place (dictionary
	reference counts in maps.c instead of dict.c), simplified
	code that was too complex (password-file structure cache)
	and fixed some code that was just wrong.

19980808

	Robustness: the number of queue manager in-core structures
	for dead hosts is limited; the limit scales with the limit
	on the number of in-core recipient structures. The idea is
	to not run out of memory under conditions of stress.

19980809

	Feature: mail to files and commands can now be restricted
	by class:  alias, forward file or include file. The default
	restrictions are:  "allow_mail_to_files = alias, forward"
	and allow_mail_to_commands = alias, forward". The idea is
	to protect against buggy mailing list managers that allow
	intruders to subscribe /file/name or "|command".

19980810-12

	Cleanup: deleted a couple hundred lines of code from the
	local delivery agent. It will never be a great program;
	sendmail compatibility is asking a severe toll.

19980814

	Cleanup: made the program shut up about some benign error
	conditions that were reported by Daniel Eisenbud.

19980814-7

	Documentation: made a start of HTML docs that describe all
	configuration parameters.

	Feature: while documenting things, added smtpd_helo_required.

19980817

	Bugfix: at startup the queue manager now updates the time
	stamps of active queue files some time into the future.
	This eliminates duplicate deliveries after "vmailer reload".

	Bugfix: the local delivery agent now applies the recipient
	delimiter after looking in the alias database, instead of
	before.

	Documentation bugfixes by Matt Shibla, Tom Limoncelli,
	Eilon Gishri.

19980819

	GLIBC fixes from Myrdraal.

	Bugfix: applied showq buffer reallocation workaround in
	the wrong place.

	Bugfix: can't use shorts in varargs lists. SunOS 4 has
	short uid_t and gid_t. pipe_command() would complain.

	Bugfix: can't use signed char in ctype macros. All ctype
	arguments are now casted to unsigned char. Thanks, Casper
	Dik.

19980820

	Bugfix: save the alias lookup result before looking up the
	owner.  The previous alpha release did this right.

	Cleanup: mail_trigger() no longer complains when the trigger
	FIFO or socket is unavailable. This change is necessary to
	shut up the sendmail mail posting program, so that it can
	be used on mail clients that mount their maildrop via NFS.

	Experiment: pickup and pipe now run as vmailer most of the
	time, and switch to user privileges only temporarily.
	Files: util/set_eugid.c global/pipe_command.c pipe/pipe.c
	pickup/pickup.c. Is this more secure/ What about someone
	manipulating such a process while not root? It still has
	ruid == 0.

19980822

	Portability: with GNU make, commands such as "(false;true)"
	and "while :; do false; done" don't fail. Workaround: use
	"set -e" all over the place.  Problem found by Jeff Wolfe.

	Feature: "check_XXX_access maptype:mapname" (XXX = client,
	helo, sender, recipient). Now you can make recipient and
	other SPAM restrictions dependent on client or sender access
	tables lookup results.

19980823

	Bugfix: smtpd access table lookup keys were case sensitive.

	Added "permit" and "reject" operators. These are useful at
	the end of SPAM restriction lists (smtpd_XXX_restrictions).

	Added a first implementation of the permit_mx_backup SPAM
	restriction. This permits mail relaying to any domain that
	lists this mail system as an MX host (including mail for
	the local machine). Thanks to Ollivier Robert for useful
	discussions.

19980824

	Bugfix: transport table lookup keys were case sensitive.  

19980825

	Portability: sa_len is some ugly #define on some SGI systems,
	so we must rename identifiers (file util/connect.c).

	Bugfix: uucp delivery errors are now sent to the sender.
	Thanks, Mark Delany.

	Bugfix: the pipe delivery agent now replaces empty sender
	by the mailer daemon address. Mark Delany, again.

	Portability: GNU getopt looks at all command-line arguments.
	Fix: insert -- into the pipe/uucp definition in master.cf.

	Bugfix: the smtp server command tokenizer silently discarded
	the [] around [text], so that HELO [x.x.x.x] was read as
	if the client had sent: HELO x.x.x.x. Thanks, Peter Bivesand.

	Bugfix: the HELO unknown hostname/bad hostname restrictions
	would have treated [text] as a domain name anyway.

	Bugfix: the $local_duplicate_filter_limit value was not
	picked up by the local delivery agent. This means the local
	delivery agent could run out of memory on large mailing
	list deliveries.

19980826

	Performance: mkmap/mkalias now run with the same speed as
	sendmail. VMailer now uses a 4096-entry cache with 1 Mbyte
	of memory for DB lookups.  File: util/dict_db.c.

19980902

	Robustness: the reject_unknown_hostname restriction for
	HELO/EHLO hostnames will now permit names that have an MX
	record instead of an A record.

19980903

	Feature: appending @$myorigin to an unqualified address is
	configurable with the boolean append_at_myorigin parameter
	(default: yes).

	Feature: appending .$mydomain to user@host is configurable
	with the boolean append_dot_mydomain parameter (default:
	yes).

	Feature: site!user is rewritten to user@site, under control
	of the boolean parameter swap_bangpath (default: yes).

	Feature: permit a naked IP address in HELO commands (i.e. an
	address without the enclosing [] as required by the RFC), by
	specifying "permit_naked_ip_address" as one of the restrictions
	in the "smtpd_helo_restrictions" config parameter.

19980904

	Code cleanup: when an SMTP client aborts a session after
	sending MAIL FROM, the cleanup service no longer warns that
	it is "skipping further client input". Files: cleanup/*.c.
	Thanks, Daniel Eisenbud, for prodding.

	Code cleanup: when an SMTP server disconnects in the middle
	of a session, don't try to send QUIT over the non-existing
	connection. Files: global/smtp_stream.c, smtp/smtp.c.
	Thanks, Daniel Eisenbud, for prodding, again.

	Code cleanup: the VMailer version number has moved from
	mail_params.h (which is included by lots of modules) to a
	separate file global/mail_version.h, so that a version
	change no longer results in massive recompilation.

	Bugfix: Errors-To was flagged as a sender address, so
	the address never was picked up.

	Code cleanup: support for Errors-To: headers completed.

19980905

	Feature: per-message exponential delivery backoff, by
	looking at the amount of time a message has been queued.
	Thanks, Mark Delany.

19980906

	Code cleanup: ripped out the per-host exponential backoff
	code. It was broken by 19980818. It was probably a bad idea
	anyway, because it required per-host, in-core, state kept
	by the queue manager.  All we do now is to keep state for
	$minimal_backoff_time seconds, but only for a limited number
	of hosts. Daniel Eisenbud spotted the problem.

	Lost feature: the SMTP session transcripts now show who
	said what. This feature was inadvertently dropped during
	development. Thanks, Daniel Eisenbud, for reminding.

	Documentation: the hard-coded rewriting process of the
	trivial-rewrite program is described in html/rewrite.html.

	Feature: the local delivery agent now does alias lookups
	before and after chopping off the recipient subaddress.
	This allows you to forward user-anything to another user,
	without losing the ability to redirect specific user-foo
	addresses.

19980909

	Feature: the smtp client now logs a warning that a server
	sends a greeting banner with the client's hostname, which
	could imply a mailer loop.

19980910

	Feature: separate canonical maps for sender and recipient
	address rewriting, so that you can rewrite an ugly sender
	address and still forward mail to that same ugly address
	without creating a mailer loop.  Files: cleanup_envelope.c,
	cleanup_message.c, cleanup_rewrite.c.

19980911

	Feature: virtual maps now support multiple addresses on
	the right-hand side. In the case of virtual domains this
	can eliminate the need for address expansion via local
	aliases, making virtual domains much easier to administer.
	This required that I moved the virtual table lookups from
	the queue manager to the cleanup service, so that every
	recipient has an on-disk status record.  Files: qmgr.c,
	qmgr_message.c, cleanup_envelope.c, cleanup_rewrite.c,
	cleanup_virtual.c.

	Feature: sendmail/mailq/newaliases pass on the -v flag to
	the program that they end up running, to make debugging a
	little easier.

19980914

	Bugfix: some anti-spam measures didn't recognize some
	addresses as local and would do too much work. File:
	smtpd_check.c.

	Bugfix: the smtp sender/recipient table lookup restriction
	destroyed global data, so that other restrictions could
	break. File: smtpd_check.c.

	Bugfix: after vmailer reload, single-threaded servers could
	exit before flushing unwritten data to the client. Example:
	cleanup would exit before acking success to pickup, so the
	message would be delivered twice. Bug reported by Brian Candler.

	Cleanup: removed spurious error output from vmailer-script.
	Reported by Brian Candler.

	Tolerance: ignore non-numeric SMTP server responses. There's
	lot of brain damage out there on the net.

19980915

	Feature: the smtp-sink benchmark tool now announces itself
	with a neutral name so that it can be run on the same
	machine as VMailer, without causing Postfix to complain
	about a mailer loop.

	Robustness: on LINUX, vmailer-script now does chattr +S to
	force synchronous directory updates. Fix developed with
	Chris Wedgwood.

19980916

	Bugfix: when transforming an RFC 822 address to external
	form, there is no need to quote " characters in comments.
	This didn't break anything, it just looked ugly.  File:
	global/tok822_parse.c

19980917

	Workaround: with deliveries to /file/name, use fsync() and
	ftruncate() only on regular files.  File: local/file.c

	Workaround: the plumbing code in master_spawn.c didn't
	check if it was dup2()/close()ing a descriptor to itself
	then closing it. Will have to redo the plumbing later.

19980918

	Workaround: on multiprocessor Solaris machines, one-second
	rollover appears to happen on different CPUs at slightly
	different times. Made the queue manager more tolerant for
	such things.  Problem reported by Daniel Eisenbud.

	Workaround: in preparation for deployment with a network-shared
	maildrop directory. make pickup more tolerant against clock
	drift between clients and servers.

19980921

	New vstream_popen() module that opens a two-way channel
	across a socketpair-based pipe. This module isn't being
	used yet; it is here only to complete the vstream code.

19980922

	Code cleanup: the xxx_server_main() interface for master
	child processes now uses a name-value argument list instead
	of an ugly and inflexible data structure.

	Bugfix: moved the test if a non-interactive process is run
	by hand, so that the "don't do this" error message can be
	printed to stderr before any significant processing.

	Bugfix: smtpd now can talk to unix-domain sockets without
	bailing out on a peer lookup problem. Files: smtpd/smtpd.c,
	util/peer_name.c.

	Safety: by default, the postmaster is no longer informed
	of protocol problems, policy violations or bounces.

	Safety: the SMTP server now sleeps before sending a [45]xx
	error response, in order to prevent clients from hammering
	the server with a connect/error/disconnect loop. Parameter:
	smtpd_error_sleep_time (default: 5).

	Feature: the logging facility is compile-time configurable
	(e.g., make makefiles "CCARGS=-DLOG_FACILITY=LOG_LOCAL1").

19980923

	Bugfix: changed virtual/canonical map search order from
	(user@domain, @domain, user) to (user@domain, user, @domain)
	so the search order is most specific to least specific.
	File: global/addr_map.c, lots of documentation.

	Bugfix: after the change of 19980910, cleanup_message
	extracted recipients from Reply-To: etc. headers.  Found
	by Lamont Jones.

19980925

	Bugfix: the change in virtual/canonical map search order
	broke @domain entries; they would never be looked up if
	the address matched $myorigin or $mydestinations. Found
	by Chip Christian who now regrets asking for the change.

	Bugfix: cleanup initialized an error mask incorrectly, so
	that it would keep writing to a file larger than the queue
	file size limit, and so it would treat the error as a
	recoverable one instead of sending a bounce. Thanks, Pieter
	Schoenmakers.

	Bugfix: the "queue file cleanup on fatal error" action was
	no longer enabled in the sendmail mail posting agent.

	Feature: the sendmail mail posting program now returns
	EX_UNAVAILABLE when the size of the input exceeds the queue
	file size limit. NB THIS CHANGE HAS BEEN WITHDRAWN.

19980926

	Code cleanup: the dotlock file locking routine is no longer
	derived from Eric Allman's 4.3BSD port of mail.local.

	Code cleanup: the retry strategy of the file locking routines
	dot_lockfile() and deliver_flock() is now configurable
	(deliver_flock_attempts, deliver_flock_delay, deliver_flock_stale).

	Code cleanup: the master.pid lock file is now created with
	symlink paranoia, and is properly locked so that PID rollover
	will not cause false matches.

	Bugfix: the vbuf_print() formatting engine did not know
	about the '+' format specifier.

	Cleanup: replaced unnecessary instances of stdio calls by
	vstream ones.

19980929-19981002

	Compatibility: added support for "sendmail -q". This required
	a change to the queue manager trigger protocol, and a code
	reorganization of the way queue scans were done. The queue
	manager socket now has become public.

10091002

	SMTPD now logs "lost connection after end-of-message" instead
	of "lost connection after DATA".

10091005

	More bullet proofing: timeouts on all triggers.

19981006

	Bugfix: make the number of cleanup processes unlimited, in
	order to avoid deadlock. The number of instances needed is
	one per smtp/pickup process, and an indeterminate number
	per local delivery agent. Thanks, Thanks, David Miller and
	Terry Lorrah for cleueing me in.

	Bugfix: "sendmail -t" extracted recipients weren't subjected
	to virtual mapping. Daniel Eisenbud strikes again.

19981007

	Compatibility: if the first input line ends in CRLF, the
	sendmail posting agent will treat all CRLF as LF. Otherwise,
	CRLF is left alone. This is a compromise between sendmail
	compatibility (all lines end in CRLF) and binary transparency
	(some, but not all, lines contain CRLF).

19981008

	Robustness: stop recursive virtual expansion when the
	left-hand side appears in its own expansion.

19981009

	Portability: trigger servers such as pickup and qmgr can
	now use either FIFOs or UNIX-domain sockets; hopefully at
	least one of them works properly. Trigger clients were
	already capable of using either form of local IPC.

19981011

	Feature: masquerading. Strip subdomains from domains listed
	in $masquerade_domains. Exception: envelope recipients are
	left alone, in order to not screw up routing.

19981015

	Code cleanup: moved the recipient duplicate filter from
	the user-level sendmail posting agent to the semi-resident
	cleanup service, so that the filter operates on the output
	from address canonicalization and of virtual expansion,
	instead of operating on their inputs.

19981016

	Bugfix: after kill()ing a bunch of child processes, wait()
	sometimes fails before all children have been reaped, and
	must be called again, or the master will SIGSEGV later.
	Problem reported by Scott Cotton.

	Workaround: don't log a complaint when an SMTP client goes
	away without sending QUIT.

19981018

	Workaround: Solaris 2.5 ioctl SIOCGIFCONF returns a hard
	error (EINVAL) when the result buffer is not large enough.
	This can happen on systems with many real or virtual
	interfaces. File: util/inet_addr_local.c. Problem reported
	by Scott Cotton.

	Workaround: the optional HELO/EHLO hostname syntax check
	now allows a single trailing dot.

	Workaround: with UNIX-domain sockets, LINUX connect() blocks
	until the server calls accept(). File: qmgr/qmgr_transport.c.
	Terry Lorrah and Scott Cotton provided the necessary evidence.

19981020

	Robustness: recursive canonical mapping terminates when
	the result stops changing.

	Code cleanup: reorganized the address rewriting and mapping
	code in the cleanup service, to make it easier to implement
	the previous enhancement.

19981022

	Code cleanup: more general queue scanning programming
	interface, in preparation for hashed queues. File:
	qmgr/qmgr_scan.c.

	Bugfix: a non-FIFO server with a process limit of 1 has a
	too short listen queue.  Until now this was not a problem
	because only FIFO servers had a process limit of 1, and
	FIFOs have no listen queue.  Fix: always configure a listen
	queue of proc_limit or more.  File: master/master_listen.c.

19981023

	Feature: by popular request, mail delay is logged when
	delivering, bouncing or deferring mail.

19981024

	Cleanup: double-bounce mail is now absorbed by the queue
	manager, instead of the local delivery agent, so that the
	mail system will not go mad when no local delivery agent
	is configured.

19981025

	Cleanup: moved the relocated table from the local delivery
	agent to the queue manager, so that the table can also be
	used for virtual addresses.

	Code reorg: in order for the queue manager to absorb
	recipients, the queue file has to stay open until all
	recipients have been assigned to a destination queue.

19981026

	vmlogger command, so that vmailer-script logging becomes
	consistent with the rest of the VMailer system.

	Code reorg: logger interface now can handle multiple output
	handlers (e.g. syslog and stderr stream).

	Bugfix: a first line starting with whitespace is no longer
	treated as an extension of our own Received: header. Files:
	smtpd/smtpd.c, pickup/pickup.c.

19981027

	Bugfix: the bang-path swapping code went into a loop on an
	address consisting of just a single !. Eilon Gishri had
	the privilege of finding this one.

	Workaround: the non-blocking UNIX-domain socket connect is
	now enabled only on systems that need it. It may cause
	kernel trouble on Solaris 2.x.

	Bugfix: the resolver didn't implement bangpath swapping,
	so that mail for site!user@mydomain would be delivered to
	a local user named "site!user".

19981028

	Cleanup: a VSTREAM can now use different file descriptors
	for reading and writing. This was necessary to prevent
	"sendmail -bs" and showq from writing to stdin. Eilon Gishri
	observed the problem.

19981029

	The RFC 822 address manipulation routines no longer give
	special attention to 8-bit data. Files: global/tok822_parse.c,
	global/quote_822_local.c.

	Bugfix: host:port and other non-domain stuff is no longer
	allowed in mail addresses.  File: qmgr/qmgr_message.c.

	Workaround: LINUX accept() wakes up before the three-way
	handshake is complete, so it can fail with ECONNRESET.
	Files: master/single_server.c, master/multi_server.c.

	Feature: when delivering to user+foo, try ~user/.forward+foo
	before trying ~user/.forward.

	Bugfix: smtpd in "sendmail -bs" (stand-alone) mode didn't
	clean up when terminated by a signal.

	Bugfix: smtpd in "sendmail -bs" (stand-alone) mode should
	not try to enforce spam controls because it cannot access
	the address rewriting machinery.

	Cleanup: the percent hack (user%domain -> user@domain) is
	now configurable (allow_percent_hack, default: yes).

	Bugfix: daemons in -S (stand-alone) mode didn't change
	directory to the queue. This was no problem with daemons
	run by the sendmail compatibility program.

19981030

	Feature: when virtual/canonical/relocated lookup fails for
	an address that contains the optional recipient delimiter
	(e.g., user+foo@domain), the search is done again with the
	unextended address (e.g., user@domain). File: global/addr_find.c.

	Code reorg: the address searching is now implemented by a
	separate module global/addr_find.c, so that the same code
	can be used for both (non-mapping) relocated table lookups
	and for canonical and virtual mapping. The actual mapping
	is still done in the global/addr_map.c module.

	Robustness: the SMTP client now skips hosts that don't send
	greeting banner text. File: smtp/smtp_connect.c

	Feature: preliminary support to disable delivered-to. This
	is desirable for mailing list managers that don't want to
	advertise internal aliases.

	Generic support: when the recipient_feature_delimiter
	configuration parameter is set, the local delivery agent
	uses it to split the recipient localpart into fields. Any
	field that has a known name such as "nodelivered" enables
	the corresponding delivery feature.

19981031

	Code reorg: address splitting on recipient delimiter is
	now centralized in global/split_addr.c, which knows about
	all reserved names that should never be split.

	Robustness: when a request for an internal service cannot
	be satisfied because the master has terminated, terminate
	instead of trying to reach the service every 30 seconds.

	Safety: the local delivery agent now runs as vmailer most
	of the time, just like pickup and pipe. Files: local/local.c,
	local/mailbox.c

19981101

	Compatibility: the tokenizer for alias/forward/etc.
	expansion now updates an optional counter with the number
	of destinations found; If no destinations is found in a
	.forward file, deliver to the mailbox instead. Thanks, 
	Daniel Eisenbud, for showing the way to go.

	Robustness: the pickup daemon should always include a
	posting-time record, even when the sendmail posting agent
	didn't. However, just like before, user-provided posting
	times will be ignored. Ollivier Robert found this one.

	Robustness: duplicate entries in aliases or maps now cause
	a warning instead of a fatal error (and an incomplete file).

	Robustness: mkmap now prints a warning when an entry is
	in "key: value" format, which is the format expected for
	alias databases, not for maps.  

	Portability: on LINUX, prepend "+" to the getopt() options
	string so that getopt() will stop at the first non-option
	argument. Suggestion by Marco d'Itri.

19981103

	Cleaned up the set_eugid() and open_as() implementations,
	and added stat_as() and fstat_as() so that the local delivery
	agent would look up include files and .forward files with
	the right privileges.

19981104

	Bugfix: the :include: routine now stat()s/open()s files
	included by root-owned aliases as root, not as nobody.

	Bugfix: the master crashed when a service with wakeup timer
	was disabled or renamed.  Fix: eliminate some pathological
	coupling between process management and wakeup management.

	Feature: partial implementation of ETRN (causes a full
	deferred queue scan). Thanks Lamont Jones for reminding me
	that things can be useful already before they are perfect.

	Cleanup: simplified the SMTPD tokenizer.

	Bugfix: sendmail -bs didn't properly notify the mail system
	of new mail.

	Compatibility: the MAIL FROM and RCPT TO commands now accept
	the most common address forms without enclosing <>. The <>
	is still needed for addresses that contain a "string", an
	[address], or a colon (:).

19981105

	Bugfix: "master -t" would claim that the master runs when
	in fact the pid directory does not exist, causing trouble
	with first time startup (reported by several).

	Portability: added a sane_accept() module that maps all
	beneficial accept() error results to EAGAIN. According to
	private communication with Alan Cox, Linux 2.0.x accept()
	can return a variety of error conditions, so we play safe
	and allow for any error that may happen because SYN+ACK
	could not be sent.

	Portability: NETBSD1 uses dotlock files (Perry Metzger).

	Bugfix: the local delivery agent did not canonicalize
	owner-foo sender addresses, so that local users would see
	owner-foo instead of owner-foo@$myorigin (Perry Metzger).

	OPENSTEP4 support, similar to NEXTSTEP3 (Gerben Wierda).

19981106

	Portability: the master startup would take a long time on
	AIX because AIX has a very large per-process open file
	limit.  Fix is to check the status of only the first couple
	hundred file descriptors instead. File: master/master.c.

	Bugfix: mail to user@[net.work.addr.ess] was broken because
	of a reversed test. File: qmgr/qmgr_message.c.

19981107

	Compatibility: don't clobber the envelope sender address
	when an alias has no owner-foo alias (problem diagnosed by
	Christophe Kalt).

	Bugfix: mail to local users in include files would be
	delivered directly if the alias didn't have an owner-foo
	alias, and if the alias database and include file were
	owned by root.

	Feature: with user+foo addresses, any +foo address extension
	that is not explicitly matched in canonical, virtual or
	alias databases is propagated to the table lookup result.

19981108

	Bugfix: minor memory leak in the user+foo table lookup code.

	Configurability: specify virtual.domain in the virtual map,
	and mail for unknown@virtual.domain will bounce automatically.
	The $relay_domains default value now includes $virtual_maps,
	so the SMTP server will accept mail for the domain. Marco
	d'Itri put me on the right track.

	Configurability: The mydestinations configuration parameter
	now accepts /file/name expressions and type:name lookup tables.

	Code cleanup: in order to make the previous two enhancements
	possible, revised the string/host/address matching engine
	so it can handle any mixture of strings, /file/name patterns
	and type:name lookup tables. Files: util/match_{list,ops}.c,
	global/{domain,namadr,string}_list.c.

19981110

	Code cleanup: replaced remaining isxxx() calls by ISXXX().

19981111

	Bugfix: the "bounce unknown virtual user" code was in the
	wrong place. Problem tackled with help of Chip Christian.

	Portability: reportedly, Solaris 2.5.1 can hang waiting
	for a UNIX-domain connection to be accepted, to it gets
	the same workaround that was designed for LINUX. Problem
	reported by Scott Cotton.

19981112

	Management: "vmailer stop" now allows delivery agents to
	finish what they are doing, like "vmailer reload".

	Management; "vmailer abort" causes immediate termination.

	Workaround: zombie processes pile up with HP-UX. Reason:
	select() does not return upon SIGCHLD when SA_RESTART is
	specified to sigaction(). Workaround: shorten the select()
	timer to 10 seconds, #ifdef BRAINDEAD_SELECT_RESTARTS.
	Thanks, Lamont Jones.

19981117

	Rename: VMailer is now Postfix. Sigh.

19981118

	Cleanup: generalized the safe_open() routine so that it is
	no longer limited to mailbox files, lock files, etc.

	Bugfix (found during code review): vstream*printf() could
	run off the end of a stream buffer after an I/O error,
	because vbuf_print() ignored the result from VBUF_SPACE().

	Bugfix (found during code review): resolve_local() could
	clobber its argument, but the docs didn't say so.

19981121

	Cleanup: the is_header() routine now allows 8-bit data in
	header labels.

19981123

	Bugfix (found during code review): the mail_queue_enter()
	path argument wasn't optional.  File: global/mail_queue.c

19981124

	Cleanup: eliminated redundant tests for a zero result from
	vstream_fdopen(). Unlike the stdio fdopen() routine, the
	vstream_fdopen() routine either succeeds or never returns.

	Bugfix: the queue manager now looks at the clock before
	examining a file time stamp, to avoid spurious complaints
	about time warps on busy machines. File:  qmgr/qmgr_active.c.

19981125

	Compatibility: allow trailing dot at the end of user@domain.
	Address canonicalization now strips it off. Issue brought
	forward by Eilon Gishri. File: trivial-rewrite/rewrite.c.

	Robustness: changed DNS lookup order of MAIL FROM etc.
	domains from MX then A to A then MX, just in case the MX
	lookup fails with a server error.

	Renamed vmcat, vmlock, vmlogger, vmtrigger to postcat,
	postlock, postlog, postkick. Also renamed mkmap and mkalias
	to postmap and postalias.

19981126

	Workaround: Lamont Jones found a way for HP-UX to terminate
	select() after SIGCHLD. The code is #ifdef USE_SIG_RETURN.
	Files:  util/sys_defs.h, master/master_sig.c.

	Bugfix: the Delivered-To: loop detection code had stopped
	working, when long ago the is_header() routine was changed.
	File: local/delivered.c.

19981128

	Bugfix: postcat opened queue files read-write, where only
	read access was needed. File: postcat/postcat.c.

19981129

	Safety: added a sleep(1) to all fatal and panic exits.
	File: util/msg.c.

19981201

	Robustness: postcat now insists that a file starts with a
	time record.

	Consistency: added "-c config_dir" command-line options
	where appropriate.

19981202

	Man pages, on-line version.

19981203

	Man pages, html version; overview documentation.

19981206

	Sendmail silently accepted the unsupported -qRsite and
	-qSsite options.  It now prints an error message and
	terminates.

	Separated the contributed tree from the IBM code; moved
	the LDAP and NEXTSTEP/OPENSTEP code to the contributed
	source tree because obviously I didn't write it.

19981206-9

	Had to write a postconf configuration utility in order to
	reliably find out about all configuration parameters and
	their defaults.

	Documentation bugfixes by Matt Shibla, Scott Drassinower,
	Greg A. Woods.

19981209

	On machines with short hostnames, postconf -d cored while
	reporting a fatal error. It should not report that error
	in the first place. Thanks, Eilon Gishri.

	Changed the FAQ entry about rejecting mail for *.my.domain
	on a firewall. Chip Christian was right, I was wrong.

19981214

	Portability: with GNU getopt, optind is not initially 1,
	breaking an assumption in sendmail/sendmail.c. Liviu Daia.

	Annoyance: on non-networked systems, don't warn that only
	one network interface was found. File:  global/inet_addr_local.c.
	Reported by several.

	Bugfix: on non-networked systems, the smtp client assumed
	that it was running in virtual host mode, and would bind
	to the loopback interface. File smtp/smtp_connect.c.  Liviu
	Daia, again.

19981220

	Robustness: when looking up an A or MX record, do not give
	up when the A query fails because of a server error.  File
	dns/dns_lookup.c. Reported by Scott Drassinower.

19981221

	Bugfix: "bounce mail for non-existent virtual user" didn't
	work when a non-default relay host was configured in main.cf
	or in the transport table. File: qmgr/qmgr_message.c.

	Bugfix: the maildrop directory should not be world-readable.
	Files: conf/postfix-script, showq/showq.c.

	Documentation: fixed several omissions and errors.

	Documentation: removed references to the broken recipient
	feature delimiter configuration parameter.

	Bugfix: write mailbox file as the recipient, so that file
	quota work as expected.

	Bugfix: pickup would die when it tried to remove a non-file
	in the maildrop directory (Jeff Wolfe).

19981222

	Sendmail no longer logs the queue ID when it is unable to
	notify the pickup daemon. This is a late addition to the
	"unreadable maildrop queue" patch.

	user.lock files are now created as root, so that postfix
	needs no group directory write permission.

19981224

	Security: allow queue file link counts > 1, to avoid
	non-delivery of maildrop files with links to a non-maildrop
	directory.  Files:  global/mail_open_ok.c, and anything
	that calls this code (qmgr, pickup, showq). If multiple
	hard links are a problem, see the set-gid "postdrop" utility
	below.

19981225

	Robustness: the queue manager no longer aborts when a queue
	file suddenly disappears (e.g. because the file was removed
	by hand).

	Feature: when a writable maildrop directory is a problem,
	sites can make the new "postdrop" utility set-gid. This command
	is never used when the maildrop directory is world-writable.

	Robustness: make the queue file creation routine more
	resistant against denial of service race attack. File:
	global/mail_queue.c

19981226

	New suid_priv module to enable/disable privileges in a
	set-uid/gid program. In the end I decided to not use it.

19981228

	Robustness: make the pickup daemon more resistant against
	non-file race attack.

	Cleanup: generic mail_stream.c interface for writing queue
	file streams to files, daemons or commands. This simplifies
	the code in smtpd and in sendmail that must be able to pipe
	mail through the postdrop command. The cleanup daemon has
	been modified to use the same interface. Result: less code.

	Feature: smtpd now logs the only recipient in Received:
	headers.

	Feature: separate command and daemon directories. Both
	default to $program_directory. Install conf/postfix-script
	if you want to use this feature.

19981230

	Patch to avoid conflict with non-writable top-level Makefile
	(Lamont Jones).

19981231

	Portability: port to UnixWare 7 by Ronald Joe Record, SCO.

19990104

	Bugfix: fencepost (Jon Ribbens, Oaktree Internet Solutions
	Ltd.) Files: quote_82[12]_local.c.

	Bugfix: wrong default for relay_domains (Juergen Kirschbaum,
	Bayerische Landesbank). File: mail_params.h.

	Bugfix: changed 5xx response for "too may recipients" to
	4xx. File: smtpd.c.

19990106

	Feature: defer_transports specifies the names of transports
	that should be used only when "sendmail -q" (or equivalent)
	is issued. For example, "defer_transports = smtp" is useful
	for sites that are disconnected most of the time. File:
	qmgr_message.c.

19990107

	Feature: local_command_shell specifies a non-default shell
	for delivery to command by the local delivery agent. For
	example, "local_command_shell = /some/where/smrsh -c"
	restricts what may appear in "|command" destinations.
	File: global/pipe_command.c.

19990112-16

	Feature: SMTP command pipelining support based on an initial
	version by Jon Ribbens, Oaktree Internet Solutions Ltd.
	This one took several days of massaging before I felt
	comfortable about it. Files: smtp.c, smtp_proto.c.

	Bugfix: the SMTP server would flush responses one-by-one,
	which caused suboptimal performance with pipelined clients.
	The vstream routines now flush the write buffer when the
	read() routine is called, instead of flushing when the
	application changes from writing to reading. Delayed flush
	prevents the SMTP server from flushing responses one-by-one
	and thus triggering Nagle's algorithm. File: util/vstream.c.

19990117

	Bugfixes and enhancements to the smtpstone tools by Drew
	Derbyshire, Kendra Electronic Wonderworks: send helo command,
	send message headers, format the message content to lines
	< 80, work around NT stacks, make "." recognition more
	robust. Files: smtp-source.c, smtp-sink.c.

	Strategy: look at the deferred queue only when the incoming
	queue is empty; limit the number of recipients read from
	a queue file depending on the number of recipients already
	in core. Files: qmgr.c, qmgr_message.c.

	Feature: postponed anti-UCE restrictions. The decision to
	reject junk mail on the basis of the client name/address,
	HELO hostname or sender address can now be postponed until
	the RCPT TO command (or HELO or MAIL FROM if you like).
	File: smtpd_check.c.

19990118

	Feature: incremental updates of alias databases and of
	other lookup tables. Both postalias and postmap now take
	a -i option for incremental updates from standard input.
	Files: global/mkmap_*.c, post{map,alias}/post{map,alias}.c.

	Compatibility: newaliases can now update multiple alias
	databases: list them in the "alias_database" parameter in
	main.cf. By the same token, postalias can now update multiple
	maps in one command. Files:  post{map,alias}/post{map,alias}.c

	Feature: mail to <> is now sent to the address specified
	with the "empty_address_recipient" configuration parameter
	which defaults to MAILER-DAEMON (idea by Lamont Jones,
	Hewlett-Packard). File: cleanup/cleanup_envelope.c.

	Compatibility: the transport table now uses .domain.name
	to match subdomains, just like sendmail mailer tables
	(patch by Lamont Jones, Hewlett-Packard).

	Feature: mailq now ends with a total queue size summary
	(Eilon Gishri, Israel Inter University Computation Center).

19990119

	Feature: address masquerade exceptions for user names listed
	in the "masquerade_exceptions" configuration parameter.
	File: cleanup/cleanup_masquerade.c.

	Feature: qmail-style maildir support, based on initial code
	by Kevin W. Brown, Quantum Internet Services Inc.

	Workaround: Solaris 2.something connect() fails with
	ECONNREFUSED when the system is busy (Chris Cappuccio,
	Empire Net). File: global/mail_connect.c.

	Feature: the cleanup service now adds a Return-Path: header
	when none is present. This header is needed for some mail
	delivery programs (see below). File: cleanup_message.c.

	Feature: the pipe mailer now supports $user, $extension
	and $mailbox macros in command-line expansions. This, plus
	the Return-Path: header (see above), should be sufficient
	to support cyrus IMAP out of the box. Based on  initial
	code by Joerg Henne, Cogito Informationssysteme GMBH.
	File: pipe/pipe.c.

	Bugfix: with address extensions enabled, canonical and
	virtual lookups now are done in the proper order:
	user+foo@domain, user@domain, user+foo, user, @domain.
	File: global/mail_addr_find.c.

19990119

	Feature: the local mailer now prepends a Received: message
	header with the queue ID to forwarded mail, in order to
	make message tracing easier.  File: local/forward.c.

	Cleanup: after "postfix reload", no more broken pipe
	complaints from resolve/rewrite clients.

19990121

	Feature: pickup (again) logs uid and sender address.
	On repeated request by Scott Cotton, Internet Consultants
	Group, Inc.

	Portability: doze() function for systems without usleep().

	Cleanup: clients are now consistently logged as host[address].

19990122

	Maildir support changed: specify "home_mailbox = Maildir/".
	The magic is the trailing /. Suggested by Daniel Eisenbud,
	University of California at Berkeley.

	Maildir support from aliases, :include: and .forward files.
	Specify /file/name/ - the trailing / is required. Suggested
	by Daniel Eisenbud, University of California at Berkeley.

	Workaround: watchdog timer to prevent the queue manager
	from locking up on some systems.

	Bugfix: in Received: headers, the "for <recipient>"
	information was in the wrong place. Pointed out by Jon
	Ribbens, Oaktree Internet Solutions Ltd.

19990124

	Portability: more workarounds for GNU getopt() by Liviu
	Daia, Institute of Mathematics, Romanian Academy. File:
	sendmail/sendmail.c.

19990125

	Bugfix: Postfix should not masquerade recipient addresses
	extracted from message headers. Problem reported by David
	Blacka, Network Solutions. File: cleanup/cleanup_message.c.

19990126

	Feature: smtpd_etrn_restrictions parameter to restrict who
	may use ETRN and what domains may be specified.  Example:
	"smtpd_etrn_restrictions = permit_mynetworks, reject".
	Requested by Jon Ribbens, Oaktree Internet Solutions Ltd.
	File: smtpd/smtpd_check.c.

19990127

	Bugfix: in an attempt to shave some cycles, the anti junk
	mail routines would use the wrong resolved address. This
	"optimization" is now turned off. Problem reported by Sam
	Eaton, Pavilion Internet Plc. File: smtpd/smtpd_check.c.

	Feature: BIFF notifications.  For compatibility reasons
	this feature is on by default.  This "protocol" can be a
	real performance pig.  Specify "biff = no" in main.cf if
	your machine has lots of shell users. Feature requested by
	Dan Farmer - it's one of the things one does for friends.
	Files:  local/mailbox.c, local/biff_notify.c.

	Bugfix: another case sensitivity problem, this time with
	virtual lookups to recognize unknown@virtual.domain.
	Problem reported by Bo Kleve, Linkoping University. File:
	qmgr/qmgr_message.c.

19990128

	Feature: with "soft_bounce = yes", defer delivery instead
	of bouncing mail. This is a safety net for configuration
	errors with delivery agents. It has no effect on errors in
	virtual maps, canonical maps, or in junk mail restrictions.
	Feature requested by Bennett Todd. File: global/bounce.c.

19990129

	Compatibility: the qmail maildir.5 documentation prescribes
	maildir file names of the form time.pid.hostname, which is
	wrong because Postfix processes perform multiple deliveries.
	Elsewhere the qmail author has documented how maildir files
	should be named under such conditions. Postfix has been
	changed to be conformant. File: local/maildir.c.

19990131

	Feature: special treatment of owner-foo and foo-request
	can be turned off. Specify "owner_request_special = no".
	Requested by Matthew Green and others. Files: local/alias.c,
	global/split_addr.c. This affects canonical, virtual and
	alias lookups.

19990204

	Portability: signal handling for HP-UX 9 by Lamont Jones
	of Hewlett Packard. File: master/master_sig.c.

	Robustness: disable random walk inside a per-site queue to
	avoid message starvation under heavy load. File: qmgr_entry.c.

	Robustness: under some conditions the queue manager could
	declare a host dead after just one delivery failure.  File:
	qmgr_queue.c.

19990212

	Feature: skip SMTP servers that greet us with a 4XX status
	code. Example: "smtp_skip_4xx_greeting = yes". By default,
	the Postfix SMTP client defers delivery when a server
	declines talking to us. File:  smtp/smtp_connect.c.

	Robustness: upon startup the queue manager now moves active
	queue files to the incoming queue instead of the deferred
	queue, to avoid anomalous delivery delays on systems that
	have a huge incoming queue.  Files: qmgr/qmgr.c,
	qmgr/qmgr_active.c, global/mail_flush.c, conf/postfix-script*

19990213

	Robustness: added watchdog timers to avoid getting stuck
	on systems with broken select() socket implementations.
	File: qmgr_transport.c, qmgr_deliver.c.

19990218

	Feature: NFS-friendly delivery to mailbox by avoiding the
	use of root privileges as much as possible. With input by
	Mike Muus, Army Research Lab, USA.

	Feature: the smtp-sink test server now supports SMTP command
	pipelining. To this end we had to generalize the timer and
	vstream support. Poor performance is fixed 19990222.

	Cleanup: timer event routines now have the same interface
	as read/write event routines (event type + context). File:
	util/events.c.

	Feature: new vstream_peek() routine to tell how much unread
	data is left in a VSTREAM buffer. This is the vstream
	variant of the peekfd() routine for kernel read buffers.
	File: util/vstream.c.

	Feature: directory scanning support for hashed mail queue
	directories. So far the results are disappointing: with
	depth = 2 (16 directories with 16 subdirectories), mailq
	takes 5 seconds with an empty queue unless all directories
	happen to be cached in memory.  We need a bit map before
	hashed queue directories become practical. Depth=1 hashing
	doesn't slow down mailq much, but doesn't help much either.
	Files: util/scan_dir.c, global/mail_scan_dir.c.

19990221

	Workaround: with "ignore_mx_lookup_error = yes", the SMTP
	client always performs an A lookup when an MX lookup could
	not be completed, rather than treating MX lookup failure
	as a temporary error condition.  Unfortunately there are
	many broken DNS servers on the Internet. File: smtp/smtp_addr.c.

19990222

	Performance: rewrote the guts of the smtp-sink test server
	so it can do pipelining without losing performance.

19990223

	Workaround: hotmail.com sometimes drops the connection
	after "." (causing misleading diagnostics to be logged) or
	waits minutes after receiving QUIT. Solution: do not wait
	for the response to QUIT. File: smtp/smtp_proto.c.  This
	is turned off with: "smtp_skip_quit_response = no".

19990224

	Feature: the pipe mailer accepts user=username:groupname,
	based on code submitted by Philip A. Prindeville, Mirapoint,
	Inc., USA.  File: pipe/pipe.c.

	Workaround: use file locking to prevent multiple processes
	from select()ing on the same socket. This causes performance
	problems on large BSD systems. Files: master/*_server.c.

19990225

	Bugfix: with "inet_interfaces = 127.0.0.1", don't bind to
	the loopback interface. Problem reported by Steve Bellovin
	of AT&T. File: smtp/smtp_addr.c.

	Feature: "postsuper" command to remove stale queue files
	to update queues after changes to the queue structure
	parameters (hash_queue_names, hash_queue_depth). This
	command is to be run from the postfix-script maintenance
	shell script.

19990301

	Feature: new postconf -h (suppress `name = ' in output)
	option to make the program easier to use in, e.g., shell
	scripts.

	Feature: dict_unix module so you can add the UNIX passwd
	table to the SMTPD access control list.

19990302

	Feature: "luser_relay = destination" captures mail for
	non-existent local recipients. This works only when the
	local delivery agent does mailbox delivery (including
	delivery via mailbox_command), not when mailbox delivery
	is delegated to another message transport.

	Feature: new reject_non_fqdn_{hostname,sender,recipient}
	restrictions to require fully.qualified.domain forms in
	HELO, MAIL FROM and RCPT TO commands (while still allowing
	the <> sender address).

19990304

	Bugfix: backed out the 19990119 change to always insert
	Return-Path:  if that header is not present. The pipe and
	local agents now are responsible for prepending Return-Path:.
	Files:  cleanup/cleanup_message.c, global/mail_copy.[hc],
	pipe/pipe.c, global/header_opts.c.  This causes an incompatible
	change to the pipe flags parameter, because Return-Path:
	now must be requested explicitly.

19990305

	Bugfix: showq (the mailq server) incorrectly assumed that
	all recipients of a deferred message are listed in the
	corresponding defer logfile. It now lists all recipients.
	Files: showq/showq.c, cleanup/cleanup_envelope.c (ensure
	that sender records always precede recipient records).

	Cleanup: smtpd HELO restrictions validate [numerical] forms.
	Files: util/valid_hostname.c, smtpd/smtpd_check.c.  Initial
	code by Philip A. Prindeville, Mirapoint, Inc., USA.

19990306

	Cleanup: re-vamped the valid_hostname module, and added a
	maximal label length (63) requirement.

	Feature: fallback_relay parameter to specify extra backup
	hosts in case the regular relay hosts are not found or not
	available.  Files:  smtp/smtp_addr.c.

	Feature: "always_bcc = address" specifies where to send a
	copy of each message that enters he system. However, if
	that copy bounces, the sender will be informed of the
	bounce. Files: smtpd/smtpd.c, pickup/pickup.c

	Compatibility: the transport map will now route on top-level
	domains, so you can dump all of .bitnet to a bitnet relay.

19990307

	Feature: LDAP lookups, updated by Jon Hensley, Merit
	Network, USA.

	Feature: regular expression (PCRE) support by Andrew
	McNamara, connect.com.au Pty. Ltd., Australia. In order to
	use this code specify pcre:/file/name. You can use this
	anywhere you would use a DB or DBM file, NIS or LDAP.
	See: PCRE_README for how to enable this code.

	Feature: "delay_warning_time = 4" causes Postfix to send
	a "your mail is delayed" notice after approx. 4 hours.
	Daniel Eisenbud, University of California at Berkeley.
	Files:  qmgr/qmgr_active.c, qmgr/qmgr_message. Postmaster
	notices for delayed mail are disabled by default. In order
	to receive postmaster notices, specify "notify_classes =
	...  delay ...".

	Cleanup: do not send undeliverable bounced mail to postmaster.
	This was causing lots of pain with junk mail from bogus
	sender addresses to non-existent recipients.  This change
	was reversed 19990311.

19990308

	Bugfix: the dotforward routine was too eager with throwing
	away extension information, so that the Delivered-To: info
	would differ for \mailbox and |command. Problem reported
	by Rafi Sadowski, Open University, Israel.

	Bugfix: seems I never got around to fix the btree access
	method. I finally did. Problem reported by: Matt Smith,
	AvTel Communications Inc., USA.

19990311

	Back by popular demand: with "notify_classes = 2bounce ..."
	Postfix will send undeliverable bounced mail to postmaster.
	The default is to not send double bounces.  This change
	reverses a change made on 19990307.

19990312

	Feature: configurable exit handler for server skeletons.
	Philip A.  Prindeville, Mirapoint, Inc., USA. Files:
	master/*server.c.

	Feature: mail_spool_directory configuration parameter to
	specify the UNIX mail spool directory.  The default setting
	is system dependent.

19990313

	Cleanup: share file descriptors for resolve and rewrite
	client connections. This puts less strain on the trivial-rewrite
	service.

	Portability: support for UnixWare 2.1 by Dmitry E. Kiselyov,
	Nizhny Novgorod City Health Emergency Station.

	Feature: configurable delays in the smtpstone test programs.
	With input by Philip A.  Prindeville, Mirapoint, Inc., USA.
	Files:  smtpstone/*.c.

	Bugfix: a "signal 11" problem in the trivial-rewrite program
	that would occasionally happen after "postfix reload".
	Reason: some rewrite clients would clobber their input,
	and when they had to retransmit the query, the input would
	be a zero-length string, which trivial-rewrite isn't supposed
	to receive.

19990314

	Feature: "mailbox_transport = cyrus" delegates all local
	mailbox delivery to a master.cf entry called "cyrus" (the
	same trick for procmail), including users not found in the
	UNIX passwd database.  This gives the flexibility of $name
	expansions by the pipe mailer, without losing local aliases
	and ~/.forward processing.  Result of discussions with Rupa
	Schomaker, RS Consulting.

19990315

	Feature: the mydestination parameter can now be an empty
	string, for hosts that don't receive any mail locally. Be
	sure to specify a default route for mail that comes to the
	machine or mail will loop.

19990316

	Bugfix: the SMTPD check scaffolding didn't apply the same
	sanity checks as the production code. Problem reported by
	Alain Thivillon, Herve Schauer Consultants, France. File:
	smtpd/smtpd_check.c.

	Portability: some systems can have more than 59 seconds in
	a minute. Based on a fix by Liviu Daia, Institute of
	Mathematics, Romanian Academy.  File:  global/mail_date.c.

	Enhancement: include the client network address in the
	rejected by RBL response. Lamont Jones, Hewlett-Packard.
	
	Workaround: use fstat() to figure out if the maildrop is
	world-writable. access() uses the real uid, which stinks.

	Robustness: don't do partial address lookups (user@, domain,
	user, @domain) with regexp-style tables.

	Security: don't allow regexp-style tables to be used for
	aliases. It would be too easy to slip in "|command" or
	:include: or /file/name.

19990317

	Feature: "fallback_transport = cyrus" delegates non-UNIX
	recipients to a master.cf entry called "cyrus", allowing
	you to have both UNIX and non-UNIX mailboxes side by side.

19990319

	Workaround: on 4.4 BSD derivatives, fstat() can return
	EBADF on an open file descriptor. Now, that was a surprise.
	This caused std{out,err} from cron commands to not be
	delivered.

	Bugfix: "local -v" stopped working.

	Workaround: more watchdog timers for postfix-unfriendly
	systems. By now every Postfix daemon has one. Call it life
	insurance. 

	Robustness: increased the maximal time to receive or deliver
	mail from $ipc_timeout (default: 3600 seconds) to the more
	generous $daemon_timeout (default: 18000 seconds). We don't
	want false alarms.

	Portability: IRIX 5.2 does not have usleep().

19990320

	Bugfix: \username was broken. Frank Dziuba was the first
	to notice.

19990321

	Workaround: from now on, Postfix on Solaris uses stream
	pipes instead of UNIX-domain sockets. Despite workarounds,
	the latter were causing more trouble than anything else on
	all systems combined.

19990322

	Portability: the makedefs would mis-identify IRIX 6.5.x as
	IRIX 5.x. Fix by Brian Truelsen of Maersk Mc-Kinney Moller
	Institute for Production Technology, Denmark.

	Feature: reject_unknown_recipient_domain restriction for
	recipient addresses. For the sake of symmetry, we now also
	have reject_unknown_sender_domain. This means the old
	reject_unknown_address restriction is being phased out.
	Suggested by Rask Ingemann Lambertsen, Denmark Technical
	University.

	Feature: unknown sender/recipient domain restrictions now
	distinguish between soft errors (always: 450) and hard
	errors (configurable with the unknown_address_reject_code
	parameter, default: 450; use 550 at your own risk).

	Feature: no HELO junk mail restrictions means that no syntax
	check will be done on HELO/EHLO hostname arguments.

	Bugfix: the initial Solaris workaround for UNIX-domain
	sockets could cause the queue manager to block if Postfix
	ran into a delivery agent process limit. After another code
	rewrite that problem is eliminated.  Thanks to Chris
	Cappuccio, Empire Net, for assistance with testing.

19990323

	Bugfix: too much forwarding when users list their own name
	in their .forward file (e.g. mail to user@localhost would
	go through .forward, would be forwarded to user@$myorigin,
	and would go through .forward again). Problem reported by
	Roman Dolejsi, Prague University of Economics.

19990324

	Bugfix: missing map name in check_xxx_access restrictions
	could cause a segmentation error. Lamont Jones, Hewlett-
	Packard.

	Feature: forward_path configuration parameter (default:
	$home/.forward$recipient_delimiter$extension,$home/.forward).
	Based on initial code by Philip A.  Prindeville, Mirapoint,
	Inc., USA.  Files:  local/dotforward.c.

19990325

	Workaround: Solaris NIS alias maps need special entries
	(YP_MASTER_NAME, YP_LAST_MODIFIED). What's worse, normal
	keys/values include a null byte at the end, but the YP_XXX
	ones don't. Problem reported by Walcir Fontanini, state
	university of Campinas, Brazil.  File: postalias/postalias.c.

	Compatibility: Solaris NIS apparently does include a null
	byte at the end of keys and values. File: util/sys_defs.h.

	Feature: library support for config parameters that are
	not $name expanded at program start-up. This was needed
	for forward_path, and will also be needed to make message
	headers customizable.

	Bugfix: pcre didn't handle \\ right. Lamont Jones, Hewlett-
	Packard. File: util/dict_pcre.c.

19990326

	Compatibility: Postfix now puts two spaces after the sender
	in a "From sender date..." header. Found by John A. Martin,
	fixed by Lamont Jones, Hewlett-Packard.

	Bugfix: when a recipient appeared multiple times in a local
	alias or include expansion, the delivery status could be
	left uninitialized, causing the mail to be deferred and 
	delivered again. File: local/recipient.c.

19990327

	Cleanup: the dictionary routines now take an extra flag
	argument to control such things as warning about duplicates,
	and appending null bytes to key/value. The latter was needed
	for a clean implementation of NIS master alias maps support.

	Feature: POSIX regular expressions by Lamont Jones. See
	config/sample-regexp.c. Right now, enabled on *BSD and
	LINUX only.

19990328

	Code cleanup: dictionaries now have flags that say whether
	lookup keys are fixed strings or whether keys are subjected
	to pattern matching. This is needed to avoid passing partial
	addresses to regexp-based lookup tables (user, @domain,
	user@, domain). Files: util/dict*.c.

	Bugfix: fixed memory leaks and core dumps in the regexp
	and pcre routines (neither handled an empty pattern file).

19990329

	Code cleanup: the dictionary I/O routines now do their own
	locking depending on dictionary flag settings. This means
	that the low-level dict_get() interface can now be used
	for safe dictionary lookups. This is needed for 19990328's
	partial lookup key support. Files: util/dict*.c. global/maps.c.

	Feature: regular expression matches are no longer limited
	to user@domain address forms in access/canonical/virtual
	maps, but can also be used for domains in transport maps.
	This needed the partial lookup key support to avoid passing
	partial addresses to regexp-based lookup tables (user,
	@domain, user@, domain). Files: global/maps.c
	global/mail_addr_find.c.

	Feature: new dictionary types can be registered with
	dict_open_register(). File: util/dict_open.c.

19990330

	Bug fix: match_list membership dictionary lookups were case
	sensitive when they should not. Patch by Lutz Jaenicke,
	BTU Cottbus, Germany.

19990402

	Feature: $domain macro support in forward_path.  Philip A.
	Prindeville, Mirapoint, Inc., USA.  File:  local/dotforward.c.

	Feature: if an address extension (+foo) is explicitly
	matched by the .forward+foo file name, do not propagate
	the extension to recipient addresses. This is more consistent
	with the way aliases are expanded. File:  local/dotforward.c.

19990404

	Bugfix: after receiving mail, the SMTP server didn't reset
	the cleanup error flag, so that multiple deliveries over
	the same SMTP session could fail due to errors with previous
	deliveries. Found by Lamont Jones, Hewlett-Packard.

19990405

	Feature: MIME-encapsulated bounces. Philip A.  Prindeville,
	Mirapoint, Inc., USA.  File:  bounce/bounce_notify_service.c

	Cleanup: vstreams now properly look at the EOF flag before
	attempting to read, eliminating the need for typing Ctrl-D
	twice to test programs; the EOF flag is reset after each
	unget or seek operation.  Files: util/vstream.c, util/vbuf.c.

	Feature: in preparation for configurable message headers
	the mac_parse() routine now balances the parentheses in
	${name} or $(name). We need this in order to support
	conditional expressions such as ${name?text} where `text'
	contains other ${name} expressions.

19990406

	Cleanup: changed MIME header information to make bounces
	more RFC 1892 compliant.

19990407

	Feature: "best_mx_transport = local" delivers mail locally
	if the local machine is the best mail exchanger (by default,
	mail is bounced with a "mail loops back to myself" error).

	Config: in order to make feature tracking easier the source
	code distribution now has a copy of the default settings in
	conf/main.cf.default.

	Feature: separate configurable postmaster addresses for
	single bounces (bounce_notice_recipient), double bounces
	(2bounce_notice_recipient), delayed mail (delay_notice_recipient),
	and for other mailer errors (error_notice_recipient).  The
	default for all is "postmaster".

19990408

	Workaround: on Solaris 2.x, the master appears to lose its
	exclusive lock on the master.pid file, so keep grabbing
	the lock each time the master wakes up from select().

	Robustness: don't flush VSTREAM buffers after I/O error.
	This prevents surprises when calling vstream_fclose() after
	truncating a mailbox to its original size.

	Portability: on LINUX systems, if <db_185.h> exists, don't
	look for <db/db.h>.

	Workaround: specify "sun_mailtool_compatibility = yes" to
	avoid clashes with the mailtool application. This disables
	kernel locks on mailbox files. Use only where needed.

	Portability: renamed readline to readlline, to avoid clashes
	with mysql.

19990409

	Bugfix: ignore temp queue files that aren't old enough.
	Problem reported by Vivek Khera, Khera Communications, Inc.

	Bugfix: fixed typo in dict_db.c that caused processes to
	not release DB shared locks.

	Feature: auto-detection of changes to DB or DBM lookup
	tables.  This avoids the need to run "postfix reload" after
	change to the smtp access table and other tables.

	Feature: regular expression checks for message headers.
	This requires support for POSIX or for PCRE regular
	expressions.  Specify "header_checks = regexp:/file/name"
	or "header_checks = pcre:/file/name", and specify
	"/^header-name:  badstuff/ REJECT" in the pattern file
	(patterns are case-insensitive by default).  Code by Lamont
	Jones, Hewlett-Packard.  It is to be expected that full
	content filtering will be delegated to an external command.

19990410

	Bugfix: auto-detection of changes to DB or DBM lookup
	tables wasn't done for TCP connections.

19990410

	Feature: $recipient expansion in forward_path.  Philip A.
	Prindeville, Mirapoint, Inc., USA.  File: local/dotforward.c

	Feature: the smtp client consistently treats a numerical
	hostname as an address. File: smtp/smtp_addr.c.

19990414

	Compatibility: support comment lines starting with # in
	$mydestination include files. This makes Postfix more
	compatible with sendmail.cw files. File: util/match_list.c.

	Feature: if your machines have short host names, specify
	"mydomain = domain.name", and you no longer have to specify
	"myhostname = host.domain.name". Files:  global/mail_params.c,
	postconf/postconf.c.

19990420

	Cleanup: bounce mail when a mailbox goes over file quota,
	instead of deferring delivery.  File:  local/mailbox.c.

19990421

	Feature: auto-detection of changes to DB or DBM lookup
	tables now includes the case where a file is unlinked.
	Philip A.  Prindeville, Mirapoint, Inc., USA.  File:
	util/dict.c.

19990422

	Robustness: Lotus mail sends MAIL FROM: <@> instead of <>.
	Problem reported by Erik Toubro Nielsen, IFAD, Denmark.
	Files:  trivial-rewrite/rewrite.c (@ becomes empty address)
	and global/rewrite_clnt.c (allow empty response).

	Bugfix: showq could segfault when writing to a broken pipe.
	Problem reported by Bryan Fullerton, Canadian Broadcasting
	Corporation. Files: util/vbuf_print.c.

	Cleanup: got rid of the "fatal: write error: Broken pipe"
	message when mailq output is piped into a program that
	terminates early.

	Cleanup: bounce messages are multipart/mixed with the error
	report as part of the first message segment, because users
	had trouble extracting the delivery error report from the
	attachment.

19990423

	Cleanup: the default junk mail reject code is now 554
	(service unavailable) rather than 550 (user unknown).

	Folded in the updated dict_ldap.c module by John Hensley,
	Merit Network, USA.

	Folded in the vstream_popen.c updates by Philip A.
	Prindeville, Mirapoint, Inc., USA.  This copies a lot of
	code from pipe_command(); the next step is to trim that
	module.

19990425

	Workaround: renamed config.h to mail_conf.h etc. in order
	to avoid name collisions with LINUX (yes, they have a system
	include file called config.h). For compatibility with people
	who have written software for Postfix, there's a config.h
	that aliases the old names to the new ones. That file will
	go away eventually.

19990426

	Feature: error mailer, in order to easily bounce mail for
	specific destinations. In the transport table, specify:
	"host.domain    error:host.domain is unavailable". Too bad
	that the transport table triggers on destination domain
	only; it would be nice to bounce specific users as well.

19990427

	Cleanup: "disable_dns_lookups = yes" now should disable
	all DNS lookups by the SMTP client.

19990428

	Bugfix: with DBM files, Postfix was watching the "dir" file
	modification time for changes. It should be watching the
	"pag" file instead.

19990429

	Cleanup: all callbacks in the master to server API now pass
	on the service name and the application-specific argument
	vector. Files: master/*server.c.

19990504

	Feature: conditional macro expansion. ${name?text} expands
	to text when name is defined, otherwise the result is empty.
	${name:text} expands to text when name is undefined,
	otherwise the result is empty. File: util/mac_expand.c.

	Feature: conditional macro expansion of the forward_path
	configuration parameters of $user, $home, $shell, $recipient,
	$extension, $domain, $mailbox and $recipient_delimiter.
	Files:  local/dotforward.c, local/local_expand.c.

19990506

	Cleanup: eliminated misleading warnings about unknown HELO
	etc. SMTPD restrictions when the HELO etc. information is
	not available. File: smtpd/smtpd_check.c.

19990507

	Feature: all smtpd reject messages now contain the MAIL
	FROM and RCPT TO addresses, if available.

19990508

	Feature: conditional macro expansion of the luser_relay
	configuration parameter. It is no longer possible to specify
	/file/name or "|command" destinations. File: local/unknown.c.

	Cleanup: changed the mac_parse interface so that the
	application callback routine can return status information.
	Updated the dict_regexp and dict_pcre modules accordingly.

	Cleanup: changed the mac_expand interface so that the caller
	provides an attribute lookup routine, instead of having to
	provide a copy of all attributes upfront. Files:
	util/mac_expand.c, local/local_expand.c.

	Feature: control over how address extensions are propagated
	to other addresses. By default, propagation of unmatched
	address extensions is now restricted to canonical and
	virtual mappings. Specify "propagate_unmatched_extensions
	= canonical, virtual, alias, forward, include" to restore
	previous behavior.

19990509

	Feature: USER, EXTENSION, DOMAIN, RECIPIENT (entire address)
	and MAILBOX (address localpart) environment variables are
	exported to shell commands (including mailbox_command).

	Feature: new command_expansion_filter parameter to control
	what characters may appear in message attributes that are
	exported via environment variables.

	Cleanup: SMTPD reject messages are more informative, and
	more complete sender/recipient information is logged for
	the local sysadmin.

19990510

	Bugfix: missing MIME header in postmaster bounce notices.
	Found by Samuel Tardieu, Ecole Nationale Superieure des
	Telecommunications, France.

	Feature: UCE restrictions are always delayed until RCPT
	TO, VRFY or ETRN. To change back to the default specify
	"smtpd_delay_reject = no" in /etc/postfix/main.cf.

	Bugfix: missing duplicate filter call. This caused too many
	deliveries when a user is listed multiple times in an alias.
	Reported by Hideyuki Suzuki, School of Engineering, University
	of Tokyo. Backed out on 19990512 because it caused problems.
	Fixed 19990513 but needs further study.

	Feature: it is now possible to move queue files back into
	the maildrop queue, so that they can benefit from changes
	in canonical and virtual mappings. In order to make this
	possible, some restrictions on queue file contents were
	relaxed. Files: pickup/pickup.c, cleanup/cleanup_extracted.c.

	Feature: made a start with integrating Joerg Henne's
	dictionary extensions to remove entries and to iterate over
	entries. That code is almost four months old by now.

19990511

	Feature: added a "undeliverable postmaster notification
	discarded" warning when mail is dropped on the floor.
	Requested by Michael Hasenstein, SuSE, Germany.

19990517

	Bugfix: reject_non_fqdn_sender/recipient would pass
	user@[ip_address] regardless of destination. Eric Cholet
	had the honor of suffering from this one.

19990527

	More SMTP client logging for easier debugging: the smtp
	client now logs hostname[ip.addr], and logs every failed
	attempt to reach an MX host, not just the last one.

19990601

	Bugfix: emit a blank line before a MIME boundary; the line
	is part of the boundary. File: bounce/bounce_notify_service.c.
	Wolfgang Segmuller, IBM Research.

19990610

	Bugfix: the "is this the loopback interface" test was
	broken.  Reported by Claus Fischer @microworld.com.
	File: smtp/smtp_connect.c.

	Usability: added helpful warnings about restrictions that
	are being ignored after check_relay_domains, etc.

	Portability: Reliant Unix support by Gert-Jan Looy, Siemens,
	the Netherlands.

19990611

	Robustness: the postfix-script start-up procedure now
	detects a missing master program, avoiding misleading
	warnings that the mail system is already running.  Fix
	suggested by David E. Smith @technopagan.org.

	Portability: Mac OS X Server Port by Mark Miller @swoon.net.

	Feature: on systems that use dotlock files for mailbox
	locking, the local delivery agent now will attempt to use
	dotlock files when delivering to user-specified files.
	Dotlock files for user-specified destinations are created
	with the privileges of the user. For backwards compatibility,
	Postfix will attempt to create dotlocks for user-specified
	destinations only when the user has parent directory write
	permission.

	Feature: specify "expand_owner_alias = yes" in order to
	use the right-hand side of an owner- alias, instead of
	using the left-hand side address. Needed by Juergen Georgi.

19990622

	Bugfix: the local delivery agent did not set user attributes
	when delivering to root, so that forward_path did not expand
	properly. Found by Jozsef Kadlecsik, KFKI Research Institute
	for Particle and Nuclear Physics, Hungary.  File:
	local/dotforward.c.

	Bugfix: the unix:passwd.byname mechanism is not suitable
	for smtpd access control - the user name would have to end
	in @, or the access control software would have to be
	changed. Removed the example from the RELEASE_NOTES file.

19990623

	Bugfix: the smtp server did not reset the error flag after
	".". Found by James Ponder, Oaktree Internet Solutions Ltd.
	File: smtpd/smtpd.c.

	Bugfix: fencepost error in the doze() routine (an usleep()
	replacement for systems without one). Found by Simon J Mudd.
	File: util/doze.c.

19990624

	Portability: support for AIX 3.2.5 (!) by Florian Lohoff
	@rfc822.org.

	Portability: Ultrix 4.3 support by Christian von Roques
	@pond.sub.org.

	Feature: mysql support by Scott Cotton and Joshua Marcus,
	Internet Consultants Group, Inc. Files: util/dict_myqsl.*.

19990627

	Bugfix: Postfix is now distributed under the new IBM Public
	License (version 1, dated June 14, 1999).

	Feature: the Delivered-To: header can be turned off for
	delivery to command or file/mailbox. The default setting
	is:  "prepend_delivered_header = command, file, forward".
	Turning off the Delivered-To: header when forwarding mail
	is not recommended.

19990628

	Feature: the postlock command now returns EX_TEMPFAIL
	when the destination file is locked by another process.

19990705

	Workaround: in the SMTP client, move the "mail loops back
	to myself test" from the 220 greeting to the HELO response.
	This change does not weaken the test, and makes Postfix
	more robust against broken software that greets with the
	client hostname.

19990706

	Workaround: in the INSTALL file, use `&&' instead of `;'
	in (cd path; tar ...) pipelines because some UNIX re-invented
	shells don't bail out when cd fails. Matthias Andree
	@stud.uni-dortmund.de.

19990709

	Bugfix: $user was not set when delivering to a non-user.
	Found by Vladimir Ulogov @ rohan.control.att.com when
	configuring a luser_relay that contained $user.

19990714

	Robustness: add PATH statement to Solaris2 chroot setup
	script to avoid running the ucb commands. Problem found
	by Panagiotis Astithas @ ece.ntua.gr.

19990721

	Bugfix: don't claim a "mail loops to myself" error when
	the best MX host was not found in the DNS. Found by Andrew
	McNamara, connect.com.au Pty Ltd. File: smtp/smtp_addr.c.

19990810

	Feature: added "-c config_dir" support to the postconf
	command. This probably means that "-f file" will never be
	implemented.

19990812

	Bugfix: showq didn't print properly when listing a maildrop
	file.  Fix by: Andrew McNamara, connect.com.au Pty Ltd.
	File: showq/showq.c.

	Feature: added SENDER to the list of parameters exported
	to external commands. File: local/command.c. Code by: Lars
	Hecking, National Microelectronics Research Centre, Ireland.

19990813

	Bugfix: sendmail -t (extract recipients from headers) did not
	work when the always_bcc feature was turned on. Reported
	by: Denis Shaposhnikov @ neva.vlink.ru.

19990813
	Bugfix: "sendmail -bd" returns a bogus exit status (the child
	process ID). Fix by Lamont Jones of Hewlett-Packard. File:
	sendmail/sendmail.c.

19990824

	Bugfix: null pointer dereference while rejecting VRFY before
	MAIL FROM. Found by Laurent Wacrenier @ fr.clara.net.

19990826

	Portability: more MacOS X Server patches; some NEXTSTEP/OPENSTEP
	code that had been removed for the first public beta release;
	NEXTSTEP/OPENSTEP now defaults to netinfo for the aliases
	database.  Submitted by Gerben Wierda.

	Portability: workaround for a FreeBSD 3.x active network
	interface without IP address by Pierre Beyssac @ enst.fr.
	File:  inet_addr_local.c.

19990831

	Workaround: sendmail now prints a warning when installed
	set-uid or when run by a set-uid command. Reportedly, the
	linuxconf software turns on the set-uid bit, which could
	open up a security loophole. File: sendmail/sendmail.c.

	Bugfix: Postfix daemons now temporarily lock DB/DBM files
	while opening them, in order to avoid "invalid argument"
	errors because some other process is changing the file.
	Files: util/dict_db.c, util/dict_dbm.c.

	Robustness: Postfix locks queue files during delivery, to
	prevent duplicate delivery when "postfix reload" is
	immediately followed by "sendmail -q". This involves a
	change of the deliver_request interface:  delivery agents
	no longer need to open and close queue files explicitly.
	Files:  global/deliver_request.c, pipe/pipe.c, smtp/smtp.c,
	local/local.c, qmgr/qmgr_active.c, qmgr/qmgr_message.c.

	Feature: reject_unauth_destination SMTP recipient restriction
	that rejects destinations not in $relay_domains.  By Lamont
	Jones of Hewlett-Packard.  File: smtpd/smtpd_check.c.

	Security: do not allow weird characters in the expansion
	of $names that appear in $forward_path. Just like with
	shell commands, replace bad characters in expansions by
	underscores.  Configuration parameter:  forward_expansion_filter.

19990902

	Documentation: added a sample postfix alias to the examples
	in the INSTALL document and in the conf/aliases file.
	Reminded by Simon J.  Mudd @ alltrading.com.

19990903

	Bugfix: in case of some error conditions the pickup daemon
	could leak small amounts of memory.

19990905

	Bugfix: no more "skipping further client input" warnings
	when a message header is rejected.

	Feature: reject_unauth_pipelining SMTP restriction that
	rejects mail from clients that improperly use SMTP command
	pipelining.

	Robustness: the LDAP client by default no longer looks up
	names containing "*". See the lookup_wildcards feature in
	LDAP_README. Update by John Hensley.

	Documentation: address masquerading with exceptions FAQ by
	Jim Seymour @ jimsun.LinxNet.com.

	Bugfix: mysql reconnect after disconnect by Scott Cotton
	Internet Consultants Group, Inc. File: util/dict_myqsl.c.

	Portability: the Postfix to PCRE interface now expects
	version 2.08.  Postfix is no longer compatible with PCRE
	versions before 2.6.

19990906

	Feature: INSTALL.sh script that makes Postfix installation
	a bit less painful. This script can be used for installing
	and for upgrading Postfix. It replaces files instead of
	overwriting them, and leaves existing configuration and
	queue files intact.

19990907

	Bugfix: reject_non_fqdn_sender used the wrong test to see
	if a sender address was given and could dump core. This
	must have been broken ever since the UCE tests were moved
	to the RCPT TO stage in 19990510.

	Bugfix: check_sender_access was recognized as a valid
	restriction name only if a sender had been specified.

19990908

	Portability: Unixware has <sysexits.h> only after sendmail
	is installed. Changed postlock.c to use global/sys_exits.h.

19990909

	Performance: added one-entry cache to the address rewriting
	client and to the address resolving client. This is because
	UCE restrictions tend to produce the same query repeatedly.
	Files: global/rewrite_clnt.c, global/resolve_clnt.c.

	Feature: the UCE restrictions are now fully recursive so
	you can have per-client/helo/sender/recipient restrictions.
	Instead of OK, REJECT or [45]xx, you can specify a sequence
	of restrictions on the right-hand side of an SMTPD access
	table. This means you can no longer use canonical/virtual/alias
	maps as SMTPD access tables. But the loss is compensated
	for.  File: smtpd/smtpd_access.c.

	Feature: restriction classes, essentially a short-hand for
	restriction lists.  These short hands are useful mostly on
	the right-hand side of SMTPD access tables. You must use
	restriction classes in order to have lookup tables on the
	right-hand side of an SMTPD access table.  File:
	smtpd/smtpd_access.c.

	Feature: "permit_recipient_map maptype:mapname" permits a
	recipient address when it matches the specified table.
	Lookups are done just as with canonical/virtual maps.  With
	this, you can also use passwd/aliases as SMTPD access maps.
	File: smtpd/smtpd_access.c.

19990910

	Changed "permit_address_map" into "permit_recipient_map"
	and added a test for the case that they specify a lookup
	table on the right-hand side of an SMTPD access map.
	File: smtpd/smtpd_access.c.

	Cleanup: removed spurious sender address checks for <>.
	File: smtpd/smtpd_check.c.

	Cleanup: the smtp client now consistently logs host[address]
	for all connection attempts.

19990919

	Feature: in an SMTPD access map, an all-numeric right-hand
	side now means OK, for better cooperation with out-of-band
	authentication mechanisms.

19990922

	Security: recipient addresses must not start with '-', in
	order to protect external commands. The old behavior is
	re-instated when main.cf specifies:  "allow_min_user =
	yes".  Credits to Mads Kiilerich @ Kiilerich.com.  File:
	qmgr/qmgr_message.c.

	Bugfix: after 19990831, the queue manager would throw away
	defer logs after deferring mail to known-to-be-dead hosts
	or message transports. This means that in some cases, mailq
	would not show why mail is delayed, and that delayed mail
	could be sent back with recipients missing from the error
	report. Reported by Giulio Orsero @ tiscalinet.it.

19990923

	Bugfix: the above bugfix broke bounces of mail with bad
	address syntax and relocated users. Problem diagnosed by
	Dick Porter @ acm.org.

	Documentation: added DO NOT EDIT THIS FILE. EDIT MAIN.CF
	INSTEAD notices to the sample-xxx.cf files.

19991007

	Compatibility: ignore the sendmail -U (initial user
	submission) option. Thomas Quinot @ cuivre.fr.eu.org.

19991103

	Code cleanup: don't send postmaster notifications when an
	SMTP client sends a DATA command while no recipients were
	accepted.  This can happen when a pipelined client runs
	into an UCE block. File:  smtpd/smtpd.c.

19991104

	Robustness: do not apply UCE header checks to mail that is
	generated by Postfix (bounces, forwarded mail etc.).  Files:
	smtpd/smtpd.c, pickup/pickup.c, cleanup/cleanup_message.c.

	Robustness: new generic watchdog module that can deal with
	clocks that jump occasionally. Files: util/watchdog.c,
	master/master.c, master/{single,multi,trigger}_server.c.
	This hopefully ends the false watchdog alarms that happen
	when clocks are set or when laptops are resumed.

	Code cleanup: BSMTP requires dot quoting as per RFC 821.
	Based on code by Florian Lohoff @ rfc822.org. Files:
	global/mail_copy.[hc], pipe/pipe.c.

19991105

	Bugfix: the crufty code in inet_addr_local() did not find
	IP aliases. File: util/inet_addr_local.c.

	Portability: the INSTALL.sh utility did not find users or
	groups in NIS or Netinfo tables. The script no longer
	searches the /etc/passwd and /etc/group files.  Instead it
	now queries the unix:passwd.byname and unix:group.byname
	maps.  For this, a -q (query) option was added to postmap
	(and to postalias, for symmetry).  Files: util/dict_unix.c,
	postalias/postalias.c, postmap/postmap.c, INSTALL.sh.

	Bugfix: LDAP lookup timeout settings were ignored. Patch
	by John Hensley. File: util/dict_ldap.c.

19991108

	Bugfix: when doing a fresh install, INSTALL.sh didn't set
	main.cf:mail_owner properly (Simon J. Mudd).

19991109

	Bugfix: when doing a fresh install, INSTALL.sh no longer
	worked (missing main.cf file).  Fix: add "-c" argument to
	the postmap commands (Lars Hecking @ nmrc.ucc.ie).

	Documentation: removed spurious "do not edit" comments from
	the sample pcre and regexp configuration files.

19991110-13

	Code cleanup: greatly simplified the SMTPD command parser
	and somewhat simplified the code that groks RFC 822-style
	address syntax in MAIL FROM and RCPT TO commands.

	New parameter: strict_rfc821_envelopes (default: no) to
	reject RFC 822 address forms (with comments etc.) in SMTP
	envelopes. By default, the Postfix SMTP server only logs
	a warning.

19991113

	Oops, also updated the SMTP VRFY code in the light of
	changes to the SMTPD command parser.

	Cleanup: the local delivery agent now explicitly rejects
	recipients with an empty username.

19991114

	Workaround: with some gawk versions, postconf/extract.awk
	reportedly returns a non-zero exit status upon success.
	Added an explicit exit(0) statement.

19991115

	Feature: DNS TXT record lookup support, based on initial
	code by Simon J Mudd.  File: dns/dns_lookup.c.

	Feature: RBL TXT record lookups, based on initial code by
	Simon J Mudd.  File: smtpd/smtpd_check.c.

	Feature: permit_auth_destination restriction based on code
	by Jesper Skriver @ skriver.dk.

	Code cleanup: the transport table now can override all
	deliveries, including local ones.

19991116

	Code cleanup: a new "local_transports" configuration
	parameter explicitly lists all transports that deliver mail
	locally. The first name listed there is the default local
	transport.  This is the end of the "empty next-hop hostname"
	hack to indicate that a destination is local.  Files:
	trivial-rewrite/resolve.c, global/local_transport.[hc]

	Feature: "postconf -m" shows what lookup table types are
	available.  Code by Scott Cotton, Internet Consultants
	Group, Inc.

	Feature: "postconf -e" edits any number of main.cf parameters.
	The edit is done on a copy, and the copy is renamed into
	the place of the original. File: postconf/postconf.c,
	util/readlline.[hc].

19991117

	Portability: SunOS 4 has no SA_RESTART. File: util/watchdog.c.

	Feature: on systems with h_errno, the "reject_unknown_client"
	restriction now distinguishes between soft errors (always
	reply with 450) and hard errors (use the user-specified
	reply code).  This should lessen the load by broken mailers
	that re-connect once a minute.

	Feature: forward/reverse name/address check for SMTP client
	hostnames. This fends off some hypothetical attacks by
	spammers who are in control of their own reverse mapping.

	Robustness: postconf no longer aborts when it can't figure
	out the local domain name; it prints a warning instead.
	This allows you to use "postconf -e" to fix the problem.

19991118

	Bugfix: the RFC822 address parser would misparse a leading
	\ as an atom all by itself. Problem reported by Keith
	Stevenson @ louisville.edu. File: global/tok822_parse.c.

19991119

	Bugfix: tiny memory leak in pipe_command() when fork()
	fails.  File: global/pipe_command.c.

19991120

	Bugfix: reversed test for all-numerical results in SMTPD
	access maps. File: smtpd/smtpd_check.c.

19991121

	Robustness: INSTALL.sh no longer uses postmap for sanity
	checks.

	Feature: INSTALL.sh now has an install_root option.

	Bugfix: INSTALL.sh now installs manual pages with proper
	permissions and ownership.

	Bugfix: the LDAP client did not properly escape special
	characters in lookup keys (patch by John Hensley).  File:
	util/dict_ldap.c.

19991122

	Bugfix: missing absolute path in INSTALL.sh broke fresh
	install.

19991124

	Bugfix: the local delivery agent's recipient duplicate
	filter did not work when configured to use unlimited memory
	(which is not a recommended setting). Patrik Rak @raxoft.cz.

19991125

	Bugfix: postconf didn't have an umask(022) call at the
	beginning (problem experienced by Matthias Andree).

19991126

	Bugfix: DNS TXT records now have string lengths before text
	(Mark Martinec @ nsc.ijs.si).

19991127

	Update: the LDAP client code now supports escapes as per
	RFC2254 (John Hensley).

19991207

	Performance: one message with many recipients no longer
	stops other mail from being delivered. The queue manager
	now frees in-memory recipients as soon as a message is
	delivered to one destination, rather than waiting until
	all in-memory destinations of that message have been tried.
	Patch by Patrik Rak @ raxoft.cz.  Files: qmgr/qmgr_entry.c,
	qmgr/qmgr_message.c.

	Performance: when delivering mail to a huge list of
	recipients, the queue manager now reads more recipients
	from the queue file before delivery concurrency drops too
	low.  Files:  qmgr/qmgr_entry.c, qmgr/qmgr_message.c.

19991208

	Updated LDAP client code by John Hensley with escape
	sequences as per RFC 2254. File: util/dict_ldap.c.

	Updated MYSQL client code by Scott Cotton. File: dict_mysql.c.

	Feature: added -N/-n options to include/exclude terminating
	nulls in keys and values in postmap/postalias DB or DBM
	files. Normally, Postfix uses whatever is appropriate for
	the host system.  A non-default setting can be necessary
	for inter-operability with third-party software.

	Bugfix: the local delivery agent would deliver to the user
	instead of the .forward file when the .forward file was
	already visited via some non-recursive path. Patch by Patrik
	Rak @ raxoft.cz. Files: global/been_here.c, local/dotforward.c.

	Robustness: attempt to deliver all addresses in the expansion
	of an alias or .forward file, even when some addresses must
	be deferred.  File: local/token.c.

19991211

	Performance: qmgr_fudge_factor controls what percentage of
	delivery resources Postfix will devote to one message.
	With 100%, delivery of one message does not begin before
	delivery of the previous message is completed. This is good
	for list performance, bad for one-to-one mail. With 10%,
	response time for one-to-one mail improves much, but list
	performance suffers. In the worst case, people near the
	start of a mailing list get a burst of postings today,
	while people near the end of the list get that same burst
	of postings a whole day later.  Files: qmgr/qmgr_message.c,
	qmgr/qmgr_entry.c.

	Bugfix: address rewriting would panic on a lone \ at the
	end of a line where an address was expected. Jason Hoos @
	thwack.net. File: global/rewrite_clnt.c.

19991215

	Bugfix: the strict RFC821 envelope address check should
	not be applied to VRFY commands. File: smtpd/smtpd.c.

	Cleanup: permit_recipient_maps is gone, because that could
	only be used inside UCE restrictions.

19991216

	Feature: allow an empty inet_interfaces parameter, just
	like an empty mydestination parameter. It's needed for true
	null clients and for firewalls that deliver no local mail.

	Feature: "disable_vrfy_command = yes" disables some forms
	of address harvesting used by spammers.

	Workaround: added the alias map parameter definition to
	the smtpd code.  This is a symptom of a general problem
	with parameters that have non-empty default values:  unless
	a program explicitly defines such a parameter, the parameter
	defaults to the empty string when used in other parameters.
	There's also a problem with evaluation order.

	Feature: the SMTP server rejects mail for unknown users in
	virtual domains that are defined by Postfix virtual domain
	files. File: smtpd/smtpd_check.c.

	Feature: reject mail for unknown local users at the SMTP
	port.  The local_recipient_maps configuration parameter
	specifies maps with all addresses that are local with
	respect to $mydestination or $inet_interfaces. Example:
	"local_recipient_maps = $alias_maps unix:passwd.byname".
	This feature is disabled by default. You may have to copy
	the passwd file into the chroot jail. File:  smtpd/smtpd_check.c.

	Feature: the sendmail -f option now understands '<user>'
	and even understands address forms with RFC 822-style
	comments.

19991217

	Cleanup: no more UCE checks for VRFY commands. It still
	reports unknown local/virtual users. File:  smtpd/smtpd_check.c.

	Robustness: upon Postfix startup, report discrepancies
	between system files inside and outside the chroot jail.
	Files: conf/postfix-script-nosgid, conf/postfix-script-sgid.

19991218

	Cleanup: INSTALL.sh produces relative symlinks, which is
	necessary when install_root is not /.

19991219

	Documentation: completely reorganized the FAQ and added
	many new entries. Rewrote the UCE html documentation.

	Cleanup: INSTALL.sh uses a configurable directory for
	scratch files, so that it can install from a file system
	that is not writable by the super-user.

	Cleanup: INSTALL.sh gives helpful hints when the "mv"
	command is unable to move symlinks across file system
	boundaries.

19991220

	Cleanup: it is no longer necessary to list $virtual_maps
	as part of the relay_domains definition. The SMTP server
	now by default accepts mail for destinations that match
	$inet_interfaces, $mydestination or $virtual_maps, whether
	or not these are specified in relay_domains.  We still need
	the ugly "virtual.domain whatever" hack in the virtual
	maps. Files:  smtpd/smtpd_check.c and lots of documentation
	and sample config files.

19991221

	Removed cyrus -q flag (ignore quotas) from the sample
	master.cf file.

19991223

	Bugfix: smtpd should not check for unknown users when
	running in stand-alone (sendmail -bs) mode. Problem
	experienced by Chuck Mead.  File: smtpd/smtpd.c.

	Retraction: the "local_transports" configuration parameter
	is gone. Adjusted code and documentation accordingly.
	Instead, use just one "local_transport" parameter with the
	name of the default local transport. Files:  smtpd/smtpd_check.c,
	qmgr/qmgr_message.c, trivial-rewrite/ resolve.c, local/resolve.c.

	Feature: Postfix SMTPD now insists that the smtpd recipient
	restrictions contain at least one restriction that by
	default rejects mail. This should make it much more difficult
	to change Postfix into an open relay.  File:  smtpd/smtpd_check.c.

	Retraction: null-length inet_interfaces is too confusing.

19991224

	Bugfix: the relative symlink code in INSTALL.sh computed
	the ../ prefix from the wrong pathname.

1999122[5-7]

	Feature: "allow_untrusted_routing = no" (default) prevents
	forwarding of source-routed mail from untrusted clients to
	destinations that are blessed by the relay_domains parameter
	(example:  user@domain2@domain1 etc.).  This plugs a mail
	relay loophole where a backup MX host forwards junk mail
	to a primary MX host which forwards the junk to the Internet.
	Files:  global/quote_822_local.c, smtp/quote_821_local.c,
	trivial-rewrite/rewrite.c, trivial-rewrite/resolve.c,
	smtp/smtpd_check.c.

	In order to make this possible, the Postfix resolver data
	structure and protocol has changed, so that all resolver
	clients need to be re-compiled.

	Side effect from the above change: from now on, an address
	with @ in the recipient localpart no longer bounces with
	"user unknown" but instead is rejected with "relay access
	denied" or "source-routed relay access denied".

19991227

	Workaround: the BSD/OS "mkdir -p" and "cmp -s" commands
	misbehave on boundary cases: directory exists or file does
	not exist. Those who re-invent...

19991229

	Added the no source routing info requirement to addresses
	accepted by the permit_mx_backup UCE restriction.

19991230

	Added a spawn daemon (not compiled and installed by default)
	to enable LMTP delivery over UNIX-domain sockets. The goal
	is to simplify the experimental LMTP delivery agent by
	ripping out the privileged code that forks the LMTP server.

20000102

	Clarified documentation after early feedback on the 19991231
	release by Drew Derbyshire, Ollivier Robert, Khetan Gajjar.

	Sanity check: a common error is to list Postfix virtual
	domains in the mydestination parameter. This causes the
	new optional local_recipient_maps feature to reject mail
	for virtual users.  The SMTP server now explicitly tests
	for this common error and logs a warning instead of refusing
	the mail.  File:  smtpd/smtpd_check.c.

20000104

	Bugfix: a case sensitivity bug had slipped through in the
	anti-relaying code, causing mail for USER@VIRTUAL.DOMAIN
	to be rejected with "relay access denied". This was found
	by Jim Maenpaa @ jmm.com.

	Questionable feature: set "smtp_skip_5xx_greeting = yes"
	to make Postfix more sendmail compatible, even though this
	is wrong, IMNSHO. File: smtp/smtp_connect.c.

	Portability: Ultrix patch from Simon Burge @ thistledown.com.au.

	Portability: Siemens Pyramid (dcosx) patch by Thomas D.
	Knox @ vushta.com.

	Performance: FreeBSD has bidirectional pipes that are faster
	than socketpairs. Anticipating on more platform-specific
	optimizations, all duplex pipe plumbing is now isolated in
	a duplex_pipe.c module that provides a system-independent
	interface.

20000105

	Cleanup: the INSTALL.sh script now updates the sample files
	in /etc/postfix even when main.cf exists.

20000106

	Bugfix: the SMTP server should consult the relocated map
	for virtual destinations (Denis Shaposhnikov). Files:
	smtpd/smtpd.c smtpd/smtpd_check.c.

20000108

	Workaround: rename() over NFS can fail with ENOENT even
	when the operation succeeds (Graham Orndorff @ WebTV). This
	is not news. Any non-idempotent operation can fail over
	NFS when the NFS server's acknowledgment is lost and the
	NFS client code retries the operation (other examples are:
	create, symlink, link, unlink, mkdir, rmdir).  Postfix has
	workarounds for the cases where this is most likely to
	cause trouble. Files:  util/sane_{rename,link}.[hc].  If
	you want reliable mail system, do not use NFS.

20000115

	Workaround: better detection of bad hardware. Added SIGBUS
	to the list of signals that the master will log before
	exiting.

20000122

	Portability: preliminary SCO5 port Christopher Wong @
	csports.com. This still needs to a workaround for "find"
	not supporting "-type s" (actually, UNIX-domain sockets
	have no unique representation in the file system and show
	up as FIFOs).

20000115-22

	Bugfix: in case of a too long message header, don't extract
	recipients from message headers.  With the previous behavior,
	Bcc information could be left in the message body, as one
	person found out the hard way.  Files:  cleanup/cleanup.c,
	cleanup/cleanup_extracted.c, global/cleanup_user.h.

20000124

	Whatever: RFC 1869 amends RFC 821 and specifies that code
	555 is to be used when a MAIL FROM or RCPT TO parameter is
	not implemented or not recognized. Russ Allbery @stanford.edu.
	This reply code is added to the list of reply codes that
	cause the Postfix SMTP client to mail a transcript to the
	postmaster.  File: smtp/smtp_trouble.c.

20000126

	Emergency feature: qmgr_site_hog_factor (default: 90 percent)
	limits the amount of resources that Postfix devotes to a
	single destination. With less than 100, Postfix defers the
	excess mail so that one site with a large backlog does not
	block other deliveries. Files: qmgr/qmgr.c, qmgr/qmgr_message.c.

20000128

	Cleanup: the queue manager no longer replaces the nexthop
	field by the recipient localpart when a destination matches
	$mydestination/$inet_interfaces. The price is the introduction
	of a new parameter local_destination_recipient_limit which
	defaults to 1 in order to maintain backwards compatibility.
	Files: qmgr/qmgr.c, qmgr/qmgr_message.c.

20000129

	Bugfix: extracted recipients were misfiled when a message
	was moved back to the maildrop queue. But they still worked
	due to a coincidence.

	Feature: bounce_recip() bounces a recipient immediately
	without accessing a bounce logfile.  This is necessary for
	VERP bounces, for bounces by delivery agents that change
	the sender address, and for bounces that for some reason
	must not use temporary logfiles.  Files: global/bounce.c,
	bounce/bounce_recip_service.c.

20000130

	Bugfix: the too long header fix of 20000115-22 lost mail
	with too long headers that didn't need to extract recipients
	from message headers.

	Bugfix: the too long header fix of 20000115-22 lost mail
	without (blank line + message body).

	Code rewrite: reorganized the cleanup daemon source code
	so that the cleanup service can be called one record at a
	time (see cleanup/cleanup_api.c); also got rid of the global
	state variables and fixed a couple bugs that were introduced
	with 20000115-22.

20000204

	Feature: in daemon mode, the MAIL FROM size check can be
	postponed until RCPT TO so that Postfix can log sender and
	recipient. Simon J Mudd.  Files: smtpd/smtpd.c

	Robustness: limit the number of recipient addresses that
	can be extracted from message headers. Parameter:
	extract_recipient_limit (default:  10240). Files:
	cleanup/cleanup_message.c, cleanup/cleanup_extracted.c.

	Cleanup: the message header reject logging now includes
	sender and recipient address (if possible), so that the
	logging looks more like the other reject logging.  File:
	cleanup/cleanup_message.c.

	Documentation: added sections on regular expression tables
	to the access, canonical, virtual, transport and relocated
	man pages, and write new man pages that are specific to
	regular expressions: pcre_table.5 and regexp_table.5.

20000214

	Bugfix: postconf reported some parameters more than once
	because the parameter extracting script didn't recognize
	lines that differ in whitespace only. File: postconf/extract.awk.
	Reported by Kenn Martin.

20000221

	Logging: the SMTP client now logs log host+port when it is
	unable to connect to a non-MX host, just like it logs
	host+port when unable to connect to an MX host.

20000226

	Bugfix: the SMTP server's "User unknown" test didn't notice
	LDAP etc. dictionary access errors. The code now reports
	a 450 status (try again instead of bounce) if the reply is
	not definitive.  File: smtp/smtpd_check.c.

	Robustness: the smtp-source program could stall when making
	hundreds of parallel connections to a Postfix system with
	only one SMTP server process. The fix is to use non-blocking
	connect() calls, very carefully. File: smtpstone/smtp-source.c.

20000303

	Feature: with smtp_always_send_ehlo the SMTP client will
	send EHLO regardless of the content of the SMTP server's
	greeting.  File: smtp/smtp_proto.c.

20000304

	Feature: DICT_FLAG_SYNC_UPDATE flag for synchronous dictionary
	updates, if supported by the underlying mechanism. Files:
	util/dict.h, util/dict_open.c, util/dict_db.c.

20000307

	Cleanup: the manual pages in Postfix configuration files
	no longer contain troff formatting codes.  The text is now
	generated from prototype files in a new "proto" subdirectory.
	Requested by Matthias Andree @ stud.uni-dortmund.de.

20000308

	Bugfix: the unused db and dbm "delete" routines would
	clobber the per-dictionary flags when called before reading
	or writing the table. Files: util/dict_dbm.c, util/dict_db.c.
	Lutz Jaenicke @ aet.TU-Cottbus.DE.

	Bugfix: the SMTP server would produce a cryptic message
	when a queue file write error happened before it had written
	any recipients.  Keith Stevenson. File: smtpd/smtpd.c.

	Robustness: the db and dbm "delete" routines didn't adjust
	to dictionaries with/without one trailing null in lookup
	keys and values. Did a complete rewrite of the routines.
	Files: util/dict_db.c, util/dict_dbm.c.

	Feature: specify "-d key" to postalias or postmap in order
	to remove one key. This still needs to be generalized to
	multi-key removal (read stdin?). Files: postmap/postmap.c,
	postalias/postalias.c.

	Test: added test targets for the dictionary delete operations.
	Files: util/Makefile.in, util/dict_test.{c,in,ref}.

	Feature: added data offset and recipient count fields to
	the first queue file record output from the cleanup daemon.
	The recipient counts provides an initial estimate for a
	more advanced queue manager scheduling algorithm. Files:
	cleanup/cleanup_envelope.c, cleanup/cleanup_extracted.c.

20000311

	Portability: HP-UX awk can't handle bare { in regexps
	(Lamont Jones. HP). File: postconf/extract.awk.

	Compatibility: sendmail now recognizes '.' as end of input.
	File: sendmail/sendmail.c.

20000313

	Compatibility: dtcm (CDE desktop calendar manager) leaks
	a file descriptor into its child process, and requires that
	sendmail closes the descriptor, otherwise mail notification
	will hang.  These GUI programmers never figured out that
	the child process must close the writing end of a pipe.
	File:  sendmail/sendmail.c.

20000314

	Feature: SASL authentication in the SMTP server and client.
	Based on code contributed by Till Franke, SuSE.  Specify:
	"smtpd_sasl_auth_enable = yes" and "smtp_sasl_auth_enable
	= yes". The "permit_sasl_authenticated" UCE restriction
	gives special treatment to authenticated clients.

20000315

	Workaround: added -blibpath option for AIX 4.x, to close
	hole in case postdrop needs to be set-gid.

20000320

	Portability: FreeBSD 5.x added to the list of supported
	systems (Mark Huizer).

20000323

	Portability: INSTALL.sh looks if sendmail is in /usr/lib
	rather than in /usr/sbin.

20000326

	Bugfix: settings in one mysql configuration file would act
	as the implicit defaults for the next one, which could be
	confusing.  Patch by Scott Cotton. File: util/dict_mysql.c.

	Robustness: limit the number of "junk" commands that can
	be issued in an SMTP session (ex.: NOOP, VRFY, ETRN, RSET).
	Problem report by Michael Ju. Tokarev @ tls.msk.ru.  Files:
	global/mail_params.h, smtpd/smtpd.c.

20000413

	Portability: more MacOS X patches by Gerben Wierda.

	Bugfix: RFC 822 requires the presence of at least one
	destination message header. The cleanup daemon now generates
	a generic "To: undisclosed-recipients:;" message header
	when no destination header is present.  The header content
	is specified with the undisclosed_recipients_header parameter.
	Problem pointed out by Geoff Gibbs, UK-Human Genome Mapping
	Project-Resource Centre.

20000416

	Workaround: allow <(comment)> as SMTP MAIL FROM address.

20000417

	The SASL authentication in the SMTP server and client works,
	but only on Linux and Solaris, neither of which I wish to
	run on my laptop.

20000418

	Added LMTP support to the smtp-source and smtp-sink utilities
	so that I don't have to install Cyrus IMAP just to test
	LMTP.

20000419

	Bugfix: removed the () from the tokenized representation
	of RFC 822 comments, so that comments with \( or \) can be
	unparsed correctly.  Problem reported by Bodo Moeller.

20000423

	Bugfix: mail_copy() could prepend > or . in the middle of
	long lines. Found by code inspection.

20000427

	New code: unescape module that translates C escape sequences
	into their equivalent character values.  File: util/unescape.c.

	Feature: the pipe mailer now has a way to specify the output
	record delimiter (for example, eol=\r\n). This is necessary
	for transports that require CRLF instead of UNIX-style LF.

20000502

	In order to support timeouts more conveniently, VSTREAMs
	now have built into them the concept of timeout.  Instead
	of calling read() and write(), the low-level VSTREAM
	interface now by default uses timed_read() and timed_write()
	which receive a timeout parameter; vstream_ctl(stream,
	VSTREAM_CTL_TIMEOUT...) sets the timeout deadline on a
	stream, and vstream_ftimeout(stream) queries a stream for
	timeout errors.  This change simplified timeout handling
	considerably.  Files: util/vbuf.h, util/vstream.[hc],
	global/smtp_stream.c, global/timed_ipc.c.

20000504

	Added application context to VSTREAMs, which is passed on
	transparently to application-provided read/write routines.
	vstream_ctl(stream, VSTREAM_CTL_CONTEXT...) sets the context.
	Files:  util/vstream.[hc].

	Added vstream_setjmp() and vstream_longjmp() support to
	make exception handling more convenient. Turn on exception
	handling with vstream_ctl(stream, VSTREAM_CTL_EXCEPT...).
	Files:  util/vstream.[hc].

	Cleaned up the smtp_stream module further and got rid of
	the global state that limited the use of this module to
	one stream per process. Files: global/smtp_stream.[hc].

20000505

	Bugfix: the SMTP server now flushes unwritten output before
	tarpit delays, to avoid protocol timeouts in pipelined
	sessions when a client causes lots of errors. Found by
	Lamont Jones, HP. File:  smtpd/smtpd_chat.c.

	Finished the LMTP client, which is based on a modified
	version of the SMTP client by Philippe Prindeville, Mirapoint,
	Inc., later modified by Amos Gouaux, UTDallas, and then
	Wietse ripped it all up again. Currently this talks LMTP
	over TCP only.

	Feature: override main.cf parameters in master.cf. Specify
	"-o parameter=value" after the program name. This allows
	you to selectively override myhostname etc. See also the
	new smtp_bind_address parameter below.

20000506

	Convenience: the LMTP and SMTP clients now append the local
	domain to unqualified nexthop destinations. This makes it
	more convenient to set up transport maps. Files:
	lmtp/lmtp_addr.c, smtp/smtp_addr.c.

	Sendmail compatibility: the Postfix SMTP client now skips
	servers that greet the client with a 4xx or 5xx status
	code.  To disable, set both smtp_skip_4xx_greeting and
	smtp_skip_5xx_greeting to "no".

20000507

	Portability: NetBSD has migrated to /etc/mail/aliases. We
	can expect to see this happen more often when systems start
	shipping Sendmail 8.10. File: util/sys_defs.h

	Updated LDAP code by John Hensley, with support for
	dereferencing of LDAP aliases, which have nothing to do
	with Postfix aliases.

	Feature: "smtp_bind_address=x.x.x.x" specifies the source
	IP address for SMTP client connections. Specify in master.cf
	as "smtp -o smtp_bind_address=x.x.x.x" in order to give
	different delivery agents different source addresses.

20000510

	Cleanup: mailbox_transport did not work with the lmtp
	delivery agent. This dates back to when Postfix used empty
	nexthop information to indicate that a destination was
	local. File: global/deliver_pass.c.

	Bugfix: configuration parameters for one mysql dictionary
	would become default settings for the next one. File:
	dict_mysql.c. This patch was merged into Postfix a while
	back but apparently that Postfix version was nuked when
	other parts were redesigned. Update by Scott Cotton.

	Bugfix: some Postfix delivery agents would abort on addresses
	of the form `stuff@.' which could be generated only locally.
	Found by Patrik Rak. File:  trivial-rewrite/resolve.c.

	Third-party Berkeley DB support for HP-UX by Lamont Jones.
	File: makedefs.

20000511

	Bugfix: Postfix would incorrectly reject domain names with
	adjacent - characters. File: util/valid_hostname.c.

	Bugfix: the 20000505 pipeline tarpit delay flush was wrong
	and caused the client and server to get out of phase. Yuck!

20000513

	Feature: VSTREAMs now have the concept of last fill/flush
	time, which is needed to prevent timeouts with pipelined
	SMTP sessions as detailed in the next item.

	Bugfix: delayed SMTP command/reply flushing to prevent
	sender delays from accumulating too much and causing timeouts
	with pipelined sessions.  For example, client-side delays
	happen when a client does DNS lookups to replace hostname
	aliases in MAIL FROM or RCPT TO commands; server-side delays
	happen when an UCE restriction involves a time-consuming
	DNS lookup, or when a server generates tarpit delays.
	Files:  lmtp/lmtp_proto.c, smtp/smtp_proto.c, smtpd/smtpd_chat.c.

	Portability: define ANAL_CAST for compilation environments
	that reject explicit casts between pointers and integral
	types. File: util/sys_defs.h, master/*server.c.  Upon closer
	investigation, this turned out to be the result of someone's
	compiler configuration preferences.  Therefore the change
	is likely to go away after a code cleanup.

20000514

	Feature: mysql client support for multi-valued queries
	(select email, email2 from aliastbl where username='$local')
	By Loic Le Loarer @ m4x.org. File: util/dict_mysql.c.

	Finalized the delayed SMTP command/reply flushing code in
	the SMTP and LMTP clients after lots of testing and review.

20000520

	Robustness: upon receipt of mail, map the mailer-daemon
	sender address back into the magic null string. File:
	cleanup/cleanup_envelope.c.

20000524

	Bugfix: the code for masquerade_exceptions was case sensitive.
	Reported by Eduard Vopicka.  File: cleanup/cleanup_masquerade.c.

20000528

	Feature: the SMTP client SASL password file can contain
	entries for destination domain names (the address remote
	part) not just mail server hostnames. File: smtp_sasl_glue.c.

	Feature: smtpd_sasl_local_domain parameter (default:
	$myhostname) to specify the local SASL authentication realm.
	File: smtpd_sasl_glue.c.

	Feature: specify "body_checks=regexp:/file/name" for a very
	crude one line at a time message body content filter.  This
	feature uses the same filtering syntax as the header_checks
	feature.  File:  cleanup/cleanup_message.c. See also the
	conf/sample-filter.cf file.

20000530

	Feature: full content filtering through external software.
	This uses existing interfaces for sending mail to the
	external content filter and for injecting it back into
	Postfix.  Details in FILTER_README.  Files: pickup/pickup.c,
	smtpd/smtpd.c, qmgr/qmgr_message.c.

20000531

	More SASL feedback by Liviu Daia, regarding the use of
	authentication realms. File smtpd/smtpd_sasl_glue.c.

	Added a simple shell-script based content filtering example
	to the FILTER_README file.

	Renamed "content inspection" etc. to "content filtering"
	in anticipation of a new hook for content inspection that
	only inspects mail without re-injecting it into Postfix.

20000601

	Feature: limit the size of pipe mailer deliveries with the
	size=nnn command-line attribute. Patch by Andrew McNamara.

20000603

	Bugfix: don't try to do SASL authentication when running
	in stand-alone (sendmail -bs) mode. Fix by Liviu Daia.

	Bug: the unauthorized pipelining test fails with single
	recipient mail when smtpd_delay_reject = yes.

20000617

	Bugfix: conf/sample-ldap.cf was no longer up to date with
	reality. Patch by Lamont Jones, HP.

	Bugfix: the maildir delivery routine left temporary files
	lying around after unsuccessful delivery (problem reported
	by Brian Laughton @ Corp.Axxent.Ca).

20000621

	AIX 4.x had POSIX regular expression support all the time
	I was working on Postfix. Better find out late than never.

20000623

	Bugfix: the SMTP server did not reset the so-called junk
	command counter after successful delivery (Mark Hoffman
	@ wallst.com).  File: smtpd/smtpd.c.

20000625

	Cleanup: remove Content-Length from incoming mail. The
	sender has no authority over the format of mail as stored
	by the receiving system. File: global/header_opts.h.

	Feature: rewrite Mail-Followup-To: as sender. Files:
	global/header_opts.[hc].

	Cleanup: rewrite Reply-To, Errors-To, Return-Receipt-To as
	sender, so that address masquerading works as expected.
	Files: global/header_opts.c.

	Feature: specify "require_home_directory = yes" to prevent
	mail from being delivered to a user whose home directory
	is not mounted. File: local/dotforward.c.

	Cleanup: the pipe deliver agent no longer appends a blank
	line when the F flag (prepend From_ line) is specified.
	Specify the B flag if you need that blank line. The local
	delivery agent no longer appends a blank line to mail that
	is delivered to external command. Files:  pipe/pipe.c,
	global/mail_copy.[hc].

20000708

	Portability: support for NEXT/OPENSTEP requires extra
	include file in util/watchdog.c (Masaki Murase).

20000715

	Added macros to turn on vstream/vstring/etc. format string
	checking by gcc, in addition to the checking that was
	already implemented with printfck.  File: util/sys_defs.h,
	the macros for PRINTFLIKE and SCANFLIKE. Problem - unlike
	the printfck tool, gcc finds format argument type mismatches
	only in code that isn't #ifdef-ed out.

20000718

	Robustness: make_dirs() now continues when a missing
	directory is created by another process.

20000720

	Feature: the queue manager now logs the number of recipients
	when opening a queue file (a zero recipient count is logged
	with older queue files). File: global/opened.c.

20000726

	Robustness: added watchdog_pat() routine to keep the watchdog
	quiet if a client stays connected for a lot of time. Files:
	util/watchdog.[hc], smtpd/smtpd.c.

20000729

	Robustness: if relayhost is specified but the host does
	not exist, defer mail instead of bouncing it (which would
	lose the mail if the bounce would have to be delivered to
	that same non-existent relayhost). Problem reported by
	Chris Cooper @ maths.ox.ac.uk. File: smtp/smtp_connect.c.

20000821

	Feature: added -r (replace key+value) option to postalias
	and postmap.

	Cleanup: smtpd now replies with 555 when the client sends
	unrecognized RCPT TO parameters, as required by RFC 1869
	(problem report by Robert Norris @ its.monash.edu.au).
	File: smtpd/smtpd.c.

20000822

	Logging: the SMTP server's SASL code logs the authentication
	method along with an authentication failure. Suggested by
	Ronald F. Guilmette @ monkeys.com.

	Workaround: some systems have file size resource limits
	that cannot be represented with the off_t type that is used
	by standard functions such as lseek(2). Problem reported
	by Blaz Zupan @ amis.net.

20000823

	Feature: all this discussion about when to reject mail and
	when not made me decide to implement a TCP-based map type
	so that it becomes relatively simple to implement dynamic
	access controls, for example, hold off mail from an unknown
	client or sender until we have completed some investigation,
	after which we will either reject or accept.

	However, this code is turned off until it is finished.

20000905

	Robustness: the dns client now rejects malformed domain
	names rather than depending on the DNS to report that the
	name does not exist. Linux returns a rather misleading
	server failure code as found out by Patrik Rak. File:
	dns/dns_lookup.c.

20000911

	Feature: added IGNORE keyword to header_checks and body_checks
	to pretend that certain data does not exist. File:
	cleanup/cleanup_message.c.

20000911

	Bugfix: the SASL code did not allow MAIL FROM... AUTH=sender
	without prior authentication. The RFC allows this, although
	one wonders what the reasoning behind this is. File:
	smtpd/smtpd_sasl_proto.c.

20000913

	Bugfix: the rmail script did not handle remote UUCP systems
	that send a from_ line with unqualified envelope sender.
	Reported by Luciano Mannucci.

	Compatibility: don't insert Sender: header lines. Sendmail
	has not done so for at least 10 years, if it ever did.
	Problem reported by Brad Knowles. File: cleanup/cleanup_message.c.

20000916

	Bugfix: when propagating an address extension in a virtual
	or canonical mapping, cleanup accesses memory that is no
	longer allocated. This can happen when the result address
	length is more than 100 characters.  Problem reported by
	Adi Prasaja @ satunet.com. File: global/mail_addr_crunch.c.

	Bugfix: fixed a misleading error message when the cleanup
	server reaches the queue file size limit. Fix by Robby
	Griffin @ MIT.EDU.  File: cleanup/cleanup_extracted.c.

20000917

	Bugfix: postalias -i would complain about duplicate entries
	for the Sendmail-compatible @ entry and for the NIS-compatible
	YP_LAST_MODIFIED and YP_MASTER_NAME entries.

20000918

	Gross hack: prevent looping on a bad recipient by always
	forwarding recipients in :include: files to a new mail
	delivery request, even when owner-listname is not set.
	File: local/recipient.c.

20000919

	Convenience: INSTALL.sh now imports default settings from
	the process environment, in order to make scripting easier.

	Robustness: INSTALL.sh now systematically skips over CVS,
	RCS and SCCS cruft.

	Portability: another fix for NEXTSTEP (Masaki MURASE).
	File: util/spawn_command.h.

20000920

	Cleanup: in a transport table entry, do not ignore port
	numbers specified as [host]:port. In fact, this is now
	becoming the preferred form, in order to avoid parsing
	problems with IPV6 addresses. Postfix supports both forms,
	but future versions will print a warning for the old form.
	Problem reported by Claus Fischer @ werhats.at

	Bugfix: missing initialization for state->sasl_method can
	cause permit_sasl_authenticated to always succeed.  Report
	and fix by Lutz Jaenicke @ aet.TU-Cottbus.DE.

	FAQ: added notes about how to delete, copy or restore queue
	files in a safe manner.

20000921

	File reorganization. No code change except Makefiles. All
	sources are pushed down by one directory level to keep file
	listings usable. Released as 20000922, so that I have a
	reference to run "diff -cr against.

	Bugfix: the spawn service was installed without man pages.

	Portability: MacOSX hints and tips by Joe Block, University
	of Central Florida School of Optics/CREOL

	Portability: The MacOSX gcc compiler does not understand
	the new printf_like/scanf_like attributes. File: util/sys_defs.h.

20000922

	Lame feature: syslog_facility parameter to control where
	syslogd sends Postfix logging (default: syslog_facility =
	mail).  However, errors during command-line parsing are
	still logged with the default syslog facility, as are errors
	while processing the main.cf file (surprise).  Based on
	code by Andrew McNamara.

20000923

	Cleanup: new bounce logfile API so that Postfix can change
	to an extensible bounce logfile format with per-recipient
	sender addresses (needed for VERP and for reporting local
	list delivery problems to the list owner) and other
	attributes.  File:  global/bounce_log.[hc].

	Cleanup: replaced the ad-hoc logfile parsing code in showq
	by something that uses the generic bounce logfile API.

20000924

	Feature: Postfix bounced mail and delayed mail notifications
	now have the standard RFC 1894 form (DSN). The bounce
	service now uses the generic bounce logfile API.  File:
	bounce/bounce_notify_service.c, bounce/bounce_notify_util.c.

	Cleanup: deleted the per-recipient bounce protocol.  Future
	bounce logfiles will support per-recipient bounce addresses.
	Files:  global/bounce.c, bounce/bounce_recip_service.

20000925

	Workaround: sendmail allows MAIL FROM and RCPT TO envelope
	addresses like <the dude <dude@site>> so we will never get
	rid of them. To disallow, specify "strict_rfc821_envelopes
	= yes".  File: smtpd/smtpd.c.

20000926-20001003

	Feature: a "flush" server that keeps per-destination records
	of deferred mail. It is the basis of a faster ETRN and
	"sendmail -qRsite" implementation. This code was rewritten
	half a dozen times.

20000928

	Bugfix: the stricter dns_lookup() argument checks revealed
	that Postfix was doing DNS lookups for domain literals
	([ip.address]) when expanding aliases in MAIL FROM and RCPT
	TO address parameters.  Reported by Jim Littlefield. File:
	smtp/smtp_unalias.c.

	Documentation: added text on the biff=yes/no parameter to
	conf/sample-local.cf (text provided by Paul Wagland,
	relational-consultancy.com.

	Robustness? Log errors from SASL library code as warnings
	not as fatal errors. Files: smtp*/*glue.c.

20001001

	Feature: in master.cf, specify ? after wakeup time to avoid
	waking up services that aren't being used.

20001003

	Feature: the fast flush refresh and purge time interval
	parameters can now be specified in user-specified units by
	providing an appropriate suffix:  s (seconds), m (minutes),
	h (hours), d (days), w (weeks).  unit.  This was needed so
	that I could test the flush server code in a reasonable
	way (its timeouts are normally specified in days or hours,
	and I don't have that much time for testing).  Other Postfix
	time interval parameters will be migrated as time permits.
	Files:  conf/sample-flush.cf, global/mail_conf_time.c,
	postconf/postconf.c.

	Unfeature: qmgr_hog_factor is now disabled by default. It
	was just too confusing. If you don't know what this means,
	do not worry.

20001005

	Cleanup: after "postfix reload" do not penalize mail that
	was in the active queue, but make it ready for immediate
	delivery so that ETRN etc. works as intended. Files:
	*qmgr/qmgr.c, *qmgr/qmgr_active.c.

	Portability: Redhat 7 library interfaces have changed
	incompatibly, which breaks existing software. File makedefs.

	Consistency: the fallback_relay parameter did not understand
	the [] or host:port syntax, and there was no way to suppress
	MX record lookups. Files: smtp/smtp_addr.c, smtp/smtp_connect.c.

	Convenience: you can now specify multiple SMTP destinations
	in the relayhost or fallback_relay configuration parameters.
	The specified destinations will be tried in the specified
	order. File:  smtp/smtp_connect.c.

	Many typographical corrections by Matthias Andree.

20001024

	Documentation: the canonical, virtual etc. manual pages
	did not document the effect of leading whitespace.

20001025

	Bugfix: virtual map expansion stopped too early with
	self-referential aliases. Reported by Michael Douglass
	@ datafoundry.net. File: cleanup/cleanup_map1n.c.

20001026

	Horror:  postmap and postalias (newaliases) silently lose
	the file lock while building a lookup table with Berkeley
	DB 2.x and later on Solaris, HP-UX, IRIX, and UNIXWARE.
	The result is that table lookups fail while the table is
	being built, so that mail is lost.  In order to avoid this
	misbehavior one has to use an undocumented feature that is
	NOT available with the DB1.85 compatibility interface.
	Therefore, Postfix now supports three Berkeley DB programming
	interfaces of increasing complexity. File: util/dict_db.c.

	Bugfix: some character manipulations were not portable for
	signed/unsigned characters. Files: global/quote_821_local.c,
	global/quote_822_local.c.

	Workaround: apparently, some software sends SMTP mail that
	begins with "From sender time-stamp". Sendmail silently
	ignores such RFC violating garbage, and therefore Postfix
	needs to jump another hoop.  File: smtpd/smtpd.c.

20001028

	Bugfix: the flush server tried to access config files after
	going to the chroot jail. Found by Lutz Jaenicke, TU-Cottbus.DE.
	File: flush/flush.c.

	Update: revised LDAP module from primary maintainer John
	Hensley, with contributions from many other people. Files:
	util/dict_ldap.c, LDAP_README.

	Update: LINUX2 chroot setup script by Matthias Andree,
	uni-dortmund.de.

	Feature: specify unix:/path/name for LMTP connections over
	UNIX-domain sockets, and specify inet:host or inet:host:port
	for IPV4. If no unix: or inet: is specified, IPV4 is assumed.
	File: lmtp/lmtp_connect.c.

	Feature: added UNIX-domain support to the smtpstone test
	programs in order to test the LMTP client UNIX-domain
	support.

20001030

	Bugfix: further testing in preparation for 19991231-pl10
	revealed that the DB map code was now broken for every
	platform.

20001031

	Performance: the slow start (gradually increase number of
	parallel connections to the same site) was too gentle and
	Postfix would back off too quickly. Files: qmgr/qmgr_queue.c
	and nqmgr/qmgr_queue.c.

20001101

	FAQ update by Ralph Hildebrandt.

20001104

	Portability: RedHat Linux has changed incompatibly, again.
	Fixed with the help of Matthias Andree.  File: makedefs.

20001109

	Cleanup: changed prototype of internal function that did
	not return a useful result. File: src/util/vstream_popen.c.

20001110

	Workaround: the Debian post install script passes an open
	file descriptor into the master server and waits forever.
	Reported by Lamont Jones. File: master/master.c.

20001114

	Compatibility: added sendmail -G (gateway submission) option
	for compatibility with the sendmail rmail command. Requested
	by David Gilbert, Velocet Communications.

20001116

	Documentation: added MAILER-DAEMON to the list of sample
	masquerade_exceptions settings in conf/sample-rewrite.cf.
	Suggested by Karl O. Pinc, pop.artic.edu.

	Performance: the slow start (gradually increase number of
	parallel connections to the same site) was too gentle and
	Postfix would back off too quickly. Files: qmgr/qmgr_queue.c
	and nqmgr/qmgr_queue.c. Yup, changed the same code, again.
	We now allow for a margin above the actual concurrency,
	with the size of the initial destination concurrency.
	Final solution by Patrik Rak.

	Bugfix: the recipient home directory test broke mailbox_transport
	support for non-UNIX recipients.  File:  local/recipient.c.

20001118

	Bugfix: the new LDAP client code did not work properly if
	the new ldap_domain parameter was not specified. LaMont
	Jones, HP.  File: util/dict_ldap.c.

	Feature: the soft_bounce safety net is extended to the SMTP
	server. With "soft_bounce = yes", The SMTP server changes
	all 5xx (reject) replies into 4xx (try again) replies.

	Documentation: the virtual(5) man page now documents both
	Postfix-style virtual domains and Sendmail-style virtual
	domains, including their interaction with local usernames,
	aliases and mailing lists. Hopefully, this ends some of
	the confusion surrounding virtual domain support. Updated
	several FAQ entries concerning virtual domain support.

	Documentation: added FAQ entry for the biff service.

20001119

	Bugfix: per-destination queue names were case sensitive so
	that the same site could have multiple queues.  Reported
	by Patrik Rak. Files: *qmgr/qmgr_message.c.

20001120

	Bugfix: per-destination deferred mail logfiles were case
	sensitive so that the same site could have multiple deferred
	mail logfiles, so that not all mail would be flushed with
	ETRN. Reported by Ralph Hildebrandt. Files:  flush/flush.c.

	Portability: added (int) casts to printf-like arguments
	that specify the width of %*letter conversions.  On some
	systems, sizeof and pointer difference expressions are
	wider than an int.  Reported by Valentin Nechayev @ lucky.net.

20001121:

	Compatibility: Postfix now retries delivery when an external
	command is killed by a signal, because people expect such
	behavior from Sendmail. File: global/pipe_command.c.

20001123-30

	Feature: mailbox locking is now configurable. The configuration
	parameter name is "mailbox_delivery_lock". Depending on
	the operating system one can specify one or more of "flock",
	"fcntl" and "dotlock". Use "postconf -l" to find out what
	locking methods Postfix supports. The default setting is
	system dependent.  All mailbox file opens are now done by
	one central mbox_open() routine. This affects the operation
	of the postlock command, and of local delivery to mailbox
	or /file/name.  Files: util/safe_open.c, util/myflock.c,
	global/deliver_flock.c, global/mbox_conf.c, global/mbox_open.c.
	local/mailbox.c, local/file.c, postlock/postlock.c.  

	Compatibility: the old sun_mailtool_compatibility parameter
	is being phased out. It still works (by turning off
	flock/fcntl locks), but logs a warning as a reminder that
	it will go away.

	Compatibility: when delivering to /file/name, the local
	delivery agent now logs a warning when it is unable to
	create a /file/name.lock file, and then delivers the mail
	(older Postfix versions would silently deliver).

20001202

	Feature: specify "smtp_never_send_ehlo = no" to disable
	ESMTP.  Someone asked for this long ago. Files:  smtp/smtp.c,
	smtp/smtp_proto.c.

	Feature? Bugfix? The smtp client now skips server replies
	that do not start with "CODE SPACE" or with "CODE HYPHEN",
	and flags them as protocol errors. Older versions silently
	treat "CODE TEXT" as "CODE SPACE TEXT".  File:  smtp/smtp_chat.c.

20001203

	Documentation: postmap(1) and postalias(1) did not document
	the process exit status for "-q key".

20001204

	Bugfix: the Postfix master daemon no longer imported
	MAIL_CONF and some other necessary environment parameters.
	Postfix now has explicit "import_environment" and
	"export_environment" configuration parameters that control
	what environment parameters are shared with non-Postfix
	processes. Files: util/clean_env.c, util/spawn_command.c,
	util/vstream_popen.c, global/pipe_command.c, and everything
	that invokes this code.

20001208

	Bugfix: while processing massive amounts of one-recipient
	mail, qmgr could deadlock for 10 seconds while sending a
	bounce message. All queue manager bounce send requests are
	now implemented asynchronously.  Files: global/abounce.[hc]
	(asynchronous bounce client), qmgr/qmgr_active.c.  Problem
	reported by El Bunzo (webpower.nl) and Tiger Technologies
	(tigertech.com).

20001209

	Feature: mailbox_transport and fallback_transport can now
	have the form transport:nexthop, with suitable defaults
	when either transport or nexthop are omitted, just like in
	the Postfix transport map. This allows you to specify for
	example, "mailbox_transport = lmtp:unix:/file/name". File:
	global/deliver_pass.c.

20001210

	Bugfix: the local_destination_concurrency_limit paramater
	no longer worked as per-user concurrency limit but instead
	worked as per-domain limit, so that the limit of "2" in
	the default main.cf files resulted in poor local delivery
	performance.  Files:  qmgr/qmgr_message.c, qmgr/qmgr_deliver.c.
	Problem reported by David Schweikert (ee.ethz.ch) and Dallas
	Wisehaupt (cynicism.com).

20001210

	Feature: support for MYSQL connections over UNIX-domain
	sockets by Piotr Klaban.  Files: util/dict_mysql.c,
	MYSQL_README.

20001211

	Small dirt: postconf -m produced too much output due to a
	missing "else", and the optional SASL code needed a fix
	for the changed name_mask API.

20001212

	Workaround: due to an error, record type L for "filter
	transport name" was the same as that for the already existing
	record type L for "record not ending in newline", causing
	the pickup daemon to discard all records not ending in
	newline. The code cannot be changed without breaking
	compatibility with queued mail, so the pickup server is
	changed to discard type L records only from the message
	envelope, not from the content. File: pickup/pickup.c.

20001213

	Bugfix: dict_ldap did not properly initialize a handle
	after connection timeout. Problem reported by Alain Thivillon.
	File: util/dict_ldap.c.

20001214

	Feature: local_transport and default_transport now also
	understand the transport[:destination] notation, so that
	all transport config parameters are similar again. File:
	trivial-rewrite/resolve.c, trivial-rewrite/transport.c.

	Code cleanup: mailbox_transport and fallback_transport no
	longer allow the user to omit the transport part of a
	transport:destination specification. That just did not make
	any sense at all. The :destination part is still optional.
	File: global/deliver_pass.c.

	Feature: most time-related configuration parameters take
	a one-letter suffix that specifies the time unit:  s
	(second), m (minutes), h (hours), d (days), w (weeks).
	"postconf -d" output includes the default time unit. Files:
	many.

	Code cleanup: in a CONFIG_TIME_TABLE, the default time unit
	is now always the last character of a default time value.
	It is no longer necessary to specify the default time unit
	separately. This change means that it will not be possible
	to specify default values in the form of function calls,
	but that was unused anyway.  Files: global/mail_conf_time.c,
	and user code.

20001217

	Bugfix: reorganized some code in the MYSQL client to end
	a number of memory allocation/deallocation problems.
	This code needs more work. File: dict_mysql.c.

20001218

	Bugfix: the MYSQL client did not provide function pointers
	for unimplemented operations, causing "postmap -d" to dump
	core instead if issuing an error message. This is what I
	get for accepting code that I cannot test myself.

20001221

	Code cleanup: configuration parameters that are $name
	expanded at run-time now have their own data type hierarchy
	instead of being piggy-backed on top of strings that are
	$name expanded at program initialization time.  Files:
	global/mail_conf.h, global/mail_conf_raw.c, and code that
	calls it.

20001230

	Update: replaced the default rbl.maps.vix.com setting by
	the current blackholes.mail-abuse.org.

20010102

	Code cleanup: the queue manager is a bit greedier with
	allocating a delivery agent. Problem pointed out by Patrik
	Rak. All bugs in the solution are mine.  Files:
	*qmgr/qmgr_active.c.

20010105

	Bugfix: the FILTER_README shell script example did not
	correctly pass exit status to the parent.

	Bugfix: soft errors in client hostname lookups would be
	treated as hard errors. Fix by Michael Herrmann
	(informatik.tu-muenchen.de). File: smtpd/smtpd_peer.c.

20010110

	Bugfix: the mkdir() EEXIST race condition workaround was
	not complete.  Matthias Andree, Daniel Roesen.  Files:
	global/mail_queue.c, util/make_dirs.c.

20010111

	Portability: IRIX 6.5.10 defines sa_len as a macro, causing
	a name collision with a variable used by Postfix. Roberto
	Totaro, enigma.ethz.ch. File:  smtpstone/smtp-source.c.

20010116

	Bugfix: REJECT by header/body_checks was flagged in smtpd
	as a bounce, should be policy, in order to make postmaster
	notifications more consistent. File: smtpd/smtpd.c.

	Merged updated chroot setup procedure by Matthias Andree.
	Files: examples/chroot-setup/LINUX2.

20010117

	Formatting: changed the seconds and days formats in the
	"your mail is delayed" text so that it does not switch to
	scientific notation. File: bounce/bounce_notify_util.c.

20010119

	Feature: SASL support for the LMTP client. Recent CYRUS
	software requires this for Postfix over TCP sockets.

20010120

	Bugfix: the 20001005 revised fallback_relay support caused
	Postfix to send mail to the fallback even when the local
	machine was an MX host for the final destination. Result:
	mailer loop. Found by Laurent Wacrenier (teaser.fr).  Files:
	smtp/smtp_connect.c, smtp/smtp_addr.c.

20010121

	Workaround: specify "broken_sasl_auth_clients = yes" in
	order to support old Microsoft clients that implement
	a non-standard version of RFC 2554 (AUTH command).

	Workaround: Lotus Domino 5.0.4 violates RFC 2554 and replies
	to EHLO with AUTH=LOGIN. File: smtp/smtp_proto.c.

20010125

	Code cleanup: wrote creator/destructor for dictionary
	objects that provides default methods that trap all attempts
	to perform an unimplemented operation. Based on an ansatz
	by Laurent Wacrenier (teaser.fr).  Files: util/dict*.[hc].

	Code cleanup: INSTALL.sh does not ask questions when stdin
	is not connected to a tty (as in: make install</dev/null).
	To automate a customized install, the script imports
	environment variables for install_root etc.

20010127

	Workaround: randomize the delay between attempts to lock
	a file, so that multiple bounce or defer servers are less
	likely to retry all at the same time.  likely.  File:
	util/rand_sleep.c, global/deliver_flock.c, global/dot_lockfile.c.

20010128

	Code cleanup: complaints about invalid or numeric hostnames
	either provide specific context or are removed as redundant.
	Files:  util/valid_hostname.c dns/dns_lookup.c.

	Code cleanup: new mailbox_size_limit parameter (default:
	20MB).  Until now, the mailbox size limit was the same as
	the message size limit, due to artefact of implementation.
	Files: global/mail_params.h, local/local.c.

	Bugfix: fix for the ldap_domains parameter, both semantics
	and documentation by LaMont Jones. Files:  LDAP_README,
	conf/sample-ldap.cf, util/dict_ldap.c.

20010129

	Cleanup: clarified documentation and boundary cases in the
	random_sleep() routine.

	Bugfix: the MISSING_USLEEP feature was used backwards.
	Patrik Rak. File: util/random_sleep.c.

20010130

	Workaround: Linux usleep() is void, BSD/Solaris usleep()
	returns int, don't use it. File util/random_sleep.c.

	Made local maildir bounce/defer handling mode consistent
	with local mailbox delivery. File local/maildir.c.

	The smtp client now defers delivery when all MX hosts have
	no A record. File: smtp/smtp_addr.c

	Bundled the man2html and postlink quick hacks so people
	can do their own manual page processing. See scripts in
	the mantools directory.

	Documentation: updated the reference to sendmail in the
	html/index.html page.

	Documentation: added note about the Cisco PIX "fixup smtp"
	bug that causes mail delivery problems when "." and "CRLF"
	arrive in separate packets. File:  html/faq.html.

20010201

	Bugfix: another missing initialization in the mysql client.
	File: util/dict_mysql.c.

	Bumped the default mailbox file size limits to 50MB.

20010202

	Bugfix: fixed the way the master resets the file size limit
	to avoid problems when a Postfix daemon updates a queue
	file.  The file size limit is now increased to INT_MAX if
	it is smaller than INT_MAX, so that it is less likely to
	interfere than the old setting of message_size_limit.

	Feature: disable mailbox size limits for the local and
	virtual delivery agents by setting mailbox_size_limit or
	virtual_mailbox_limit to zero.

20010203

	Cleanup: added one gruesome command to the postlink script
	for hyperlinking nroff manual page output. Word abbreviation
	broke some <a href...> </a> instances across line boundaries.
	sed(1) is an amazing tool.  File: mantools/postlink.

20010204

	Laid the ground work for logging of table accesses. This
	will give more insight into how Postfix uses its lookup
	tables. User interface comes later.  File:  util/dict_debug.c.

20010216

	Bugfix: the pipe delivery agent expanded $size as if it
	were a recipient, instead of expanding it as $nexthop or
	as $sender. Reported by Michael Tokarev. File: pipe/pipe.c.

20010221

	Bugfix: poor LMTP performance for domains that are listed
	in $mydestination, because Postfix would send one recipient
	at a time, with multiple deliveries of recipients of the
	same message in parallel; a similar problem could exist
	with virus scanning and with firewall relay hosts that
	forward mail for $mydestination to an inside machine. This
	behavior is now changed to depend on the transport-specific
	xxx_destination_recipient_limit parameter.  This also means
	that you can now get qmail behavior for SMTP deliveries by
	setting smtp_destination_recipient_limit=1.  File:
	{qmgr,nqmgr}/qmgr_message.c.

	Workaround: Solaris socketpair() can fail with EINTR. Added
	a sane_socketpair.c module that joins the ranks of the other
	sane_whatever workarounds. Reported by Andrew McNamara.
	File: util/sane_socketpair.[hc]

20010222

	Documentation: the default main.cf file has a prominent
	warning that mynetworks should be properly configured in
	order to reject unauthorized mail relay requests from
	strangers.

	Documentation: the INSTALL document, section "mandatory
	configuration file edits" has a section that explains that
	mynetworks should be properly configured in order to reject
	unauthorized mail relay requests from strangers.

20010223

	Documentation: the basic.html document has a section that
	explains that mynetworks should be properly configured in
	order to reject unauthorized mail relay requests from
	strangers.

	Feature: new "mynetworks_style" parameter that controls
	how mynetworks (trusted networks) is derived from the
	inet_interfaces (machine interfaces) setting. Specify
	"class" for entire class A, B, C networks; "subnet" for
	the local subnets only; or "host" for maximal privacy.
	Files:  util/inet_addr_local.[hc], global/own_inet_addr.[hc],
	global/mynetworks.[hc], postconf/postconf.c.

	Portability: MACOSX patches by Gerben Wierda.

	Portability: Solaris /dev/null is a symlink, which tripped
	up the code to safely open a file before local delivery. We now
	grudgingly allow symlinks owned by root. File: util/safe_open.c.

20010224

	Bugfix: "postconf mynetworks" ignored the inet_interfaces
	setting. That was a very old one. File: postconf/postconf.c.

	INCOMPATIBLE CHANGE: POSTFIX NO LONGER RELAYS MAIL FOR
	CLIENTS IN THE ENTIRE CLASS A/B/C NETWORK. POSTFIX BY
	DEFAULT RELAYS MAIL FOR CLIENTS IN THE LOCAL SUBNETWORK.
	Specify "mynetworks_style = class" to get the old behavior.

20010225

	Portability: master sigchld handler based on writing to a
	pipe, so that the master wakes up from select(). Based on
	code by Erik Forsberg, Linkoping University, Sweden.  File:
	master/master_sig.c. Disabled until after the major release.

	Code cleanup: Postfix should now run with no alias database.

	Code cleanup: local_destination_recipient_limit and
	local_destination_concurrency_limit have become first-class
	configuration parameters. Files: global/mail_params.h,
	*qmgr/qmgr.c, postconf/postconf.c.

20010226

	Documentation suggestions by Lars Hecking and Richard
	Huxton, Matthias Andree and many others.

	Code cleanup: some queue/transport operations need to be
	moved, after the code cleanup of the recipient/concurrency
	limit handling. Patrik Rak.  Files: *qmgr/qmgr_message.c.

20010313

	Bugfix: the RFC 822 untokenizer quoted newlines inside
	comments. File: global/tok822_parse.c.

20010316

	Cleanup: removed an extraneous warning when a queue file
	write error happened.

20010321

	Workaround: LMTP connection caching never worked for
	destinations starting with unix: or inet:. File:
	lmtp/lmtp_connect.c.

20010322

	Portability: Solaris <2.6 does not have srandom() and
	random() in libc. File: util/rand_sleep.c. It does not have
	to be cryptographically strong.

	Bugfix: the fast ETRN flush server could not handle [ipaddr]
	or domain names with one-character hostname part.  This
	fix changes the destination to logfile name mapping, so
	that you need to populate the new files with "sendmail -q".
	The old files go away automatically. File:  flush/flush.c.

20010327

	Speed up mailq (sendmail -bp) display by flushing output
	after each file.  File: showq/showq.c.

	Portability: missing string.h includes, %p wants (void *),
	Lamont Jones, HP.

20010328

	Bugfix: swapped logic caused cleanup to stall when the
	queue file size exceeded the file size limit by less than
	one the VSTREAM buffer size, so that the "file too big"
	was detected after flushing the last queue file record.
	File: cleanup/cleanup.c.

20010329

	Portability: workaround for missing prototype problem in
	dict_ldap.c. This module should move to the global directory,
	because it depends on Postfix main.cf parameter information.

20010403

	Workaround: the mysql library can return null pointers
	rather than zero-length strings.

20010404

	Ergonomics: log additional information about the reason
	why "mail for XXX loops back to myself", when the local
	machine is the best MX host. File: smtp/smtp_addr.c.

20010406

	Changed some noisy LDAP client warnings into optional
	logging. LaMont Jones, util/dict_ldap.c.

20010411

	Bugfix: the SMTP server now replies with 550 instead of
	503 when it receives the DATA command without having received
	a valid recipient address. This is needed for the Sendmail
	client-side pipelining implementation. Problem reported by
	Lutz Jaenicke. File: smtpd/smtpd.c.

	Cleanup: shut up if chattr fails on Reiserfs and other file
	systems that do not support the respective attributes.
	Files: conf/postfix-script-{no,}sgid.

20010413

	Ergonomics: Postfix applications now warn when a DB or DBM
	file is out of date, and recommend to rebuild the table.
	Files: util/dict_db.c, util/dict_dbm.c.

20010414

	Bugfix: with a non-default inet_interfaces setting, the
	master ignored host information in master.cf host:port
	settings.  Fix by Jun-ichiro itojun Hagino @ iijlab.net.
	Files: master/master.h, master/master_ent.c.

20010426

	Bugfix: the SMTP server did not parse invalid MAIL FROM or
	RCPT TO addresses such as <first last <user@domain>> the
	way it was supposed to do.  I thought this was taken care
	of years ago. File:  smtpd/smtpd.c.

20010427

	Bugfix: smtpd would reject mail instead of replying with
	a 4xx temporary error code when, for example, an LDAP or
	mysql server was unavailable. Remotely based on a fix by
	Robert Kiessling @ de.easynet.net. File: smtpd/smtpd_check.c.

20010501

	Bugfix: The SMTP server's 550 in reply to DATA should be
	a 554 response.  And it wasn't Sendmail. Claus Assman.

	Bugfix: the INSTALL.sh test for non-interactive upgrade
	broke rooted installations that specify settings via the
	environment.  Simon Mudd.

	Bugfix: mailq output is now really flushed one message at
	a time. File: sendmail/sendmail.c.

20010507

	Bugfix: with soft_bounce=yes, the SMTP server would log
	5xx replies even though it would send 4xx replies to the
	client (Phil Howard, ipal.net). File: smtpd/smtpd_check.c.

20010523

	Bugfix: postsuper's temporary file detection logic needed
	fixing.

	Bugfix: memory leak in the LDAP client module. Alain
	Thivillon, France Teaser - Groupe Firstream.

20010525

	Bugfix: the SMTP and LMTP clients claimed that a queue file
	needed to be delivered again (even when all recipients were
	erased from the queue file) when no QUIT or RSET reply was
	received (by default, this does not happen with SMTP mail
	because the SMTP client does not wait for QUIT replies and
	does not send RSET to deliver mail).  As a result of the
	same bug the LMTP client followed a dangling pointer when
	sending QUIT after process idle timeout while the LMTP
	server had disconnected.  Files:  smtp/smtp_proto.c,
	lmtp/lmtp_proto.c.