NetBSD/gnu/dist/sendmail/cf/m4/proto.m4

divert(-1)
#
# Copyright (c) 1998-2000 Sendmail, Inc. and its suppliers.
#	All rights reserved.
# Copyright (c) 1983, 1995 Eric P. Allman.  All rights reserved.
# Copyright (c) 1988, 1993
#	The Regents of the University of California.  All rights reserved.
#
# By using this file, you agree to the terms and conditions set
# forth in the LICENSE file which can be found at the top level of
# the sendmail distribution.
#
#
divert(0)

VERSIONID(`Id: proto.m4,v 8.446 2000/04/06 06:29:45 gshapiro Exp')

MAILER(local)dnl

# level CF_LEVEL config file format
V`'CF_LEVEL/ifdef(`VENDOR_NAME', `VENDOR_NAME', `Berkeley')
divert(-1)

# do some sanity checking
ifdef(`__OSTYPE__',,
	`errprint(`*** ERROR: No system type defined (use OSTYPE macro)
')')

# pick our default mailers
ifdef(`confSMTP_MAILER',, `define(`confSMTP_MAILER', `esmtp')')
ifdef(`confLOCAL_MAILER',, `define(`confLOCAL_MAILER', `local')')
ifdef(`confRELAY_MAILER',,
	`define(`confRELAY_MAILER',
		`ifdef(`_MAILER_smtp_', `relay',
			`ifdef(`_MAILER_uucp', `uucp-new', `unknown')')')')
ifdef(`confUUCP_MAILER',, `define(`confUUCP_MAILER', `uucp-old')')
define(`_SMTP_', `confSMTP_MAILER')dnl		for readability only
define(`_LOCAL_', `confLOCAL_MAILER')dnl	for readability only
define(`_RELAY_', `confRELAY_MAILER')dnl	for readability only
define(`_UUCP_', `confUUCP_MAILER')dnl		for readability only

# back compatibility with old config files
ifdef(`confDEF_GROUP_ID',
`errprint(`*** confDEF_GROUP_ID is obsolete.
    Use confDEF_USER_ID with a colon in the value instead.
')')
ifdef(`confREAD_TIMEOUT',
`errprint(`*** confREAD_TIMEOUT is obsolete.
    Use individual confTO_<timeout> parameters instead.
')')
ifdef(`confMESSAGE_TIMEOUT',
	`define(`_ARG_', index(confMESSAGE_TIMEOUT, /))
	 ifelse(_ARG_, -1,
		`define(`confTO_QUEUERETURN', confMESSAGE_TIMEOUT)',
		`define(`confTO_QUEUERETURN',
			substr(confMESSAGE_TIMEOUT, 0, _ARG_))
		 define(`confTO_QUEUEWARN',
			substr(confMESSAGE_TIMEOUT, eval(_ARG_+1)))')')
ifdef(`confMIN_FREE_BLOCKS', `ifelse(index(confMIN_FREE_BLOCKS, /), -1,,
`errprint(`*** compound confMIN_FREE_BLOCKS is obsolete.
    Use confMAX_MESSAGE_SIZE for the second part of the value.
')')')


# Sanity check on ldap_routing feature
# If the user doesn't specify a new map, they better have given as a
# default LDAP specification which has the LDAP base (and most likely the host)
ifdef(`confLDAP_DEFAULT_SPEC',, `ifdef(`_LDAP_ROUTING_WARN_', `errprint(`
WARNING: Using default FEATURE(ldap_routing) map definition(s)
without setting confLDAP_DEFAULT_SPEC option.
')')')dnl

# clean option definitions below....
define(`_OPTION', `ifdef(`$2', `O $1`'ifelse(defn(`$2'), `',, `=$2')', `#O $1`'ifelse(`$3', `',,`=$3')')')dnl

dnl required to "rename" the check_* rulesets...
define(`_U_',ifdef(`_DELAY_CHECKS_',`',`_'))
dnl default relaying denied message
ifdef(`confRELAY_MSG', `', `define(`confRELAY_MSG', `"550 Relaying denied"')')
divert(0)dnl

# override file safeties - setting this option compromises system security,
# addressing the actual file configuration problem is preferred
# need to set this before any file actions are encountered in the cf file
_OPTION(DontBlameSendmail, `confDONT_BLAME_SENDMAIL', `safe')

# default LDAP map specification
# need to set this now before any LDAP maps are defined
_OPTION(LDAPDefaultSpec, `confLDAP_DEFAULT_SPEC', `-h localhost')

##################
#   local info   #
##################

Cwlocalhost
ifdef(`USE_CW_FILE',
`# file containing names of hosts for which we receive email
Fw`'confCW_FILE',
	`dnl')

# my official domain name
# ... `define' this only if sendmail cannot automatically determine your domain
ifdef(`confDOMAIN_NAME', `Dj`'confDOMAIN_NAME', `#Dj$w.Foo.COM')

CP.

ifdef(`UUCP_RELAY',
`# UUCP relay host
DY`'UUCP_RELAY
CPUUCP

')dnl
ifdef(`BITNET_RELAY',
`#  BITNET relay host
DB`'BITNET_RELAY
CPBITNET

')dnl
ifdef(`DECNET_RELAY',
`define(`_USE_DECNET_SYNTAX_', 1)dnl
# DECnet relay host
DC`'DECNET_RELAY
CPDECNET

')dnl
ifdef(`FAX_RELAY',
`# FAX relay host
DF`'FAX_RELAY
CPFAX

')dnl
# "Smart" relay host (may be null)
DS`'ifdef(`SMART_HOST', SMART_HOST)

ifdef(`LUSER_RELAY', `dnl
# place to which unknown users should be forwarded
Kuser user -m -a<>
DL`'LUSER_RELAY',
`dnl')

# operators that cannot be in local usernames (i.e., network indicators)
CO @ % ifdef(`_NO_UUCP_', `', `!')

# a class with just dot (for identifying canonical names)
C..

# a class with just a left bracket (for identifying domain literals)
C[[

ifdef(`_ACCESS_TABLE_', `dnl
# access_db acceptance class
C{Accept}OK RELAY
ifdef(`_DELAY_CHECKS_',`dnl
ifdef(`_BLACKLIST_RCPT_',`dnl
# possible access_db RHS for spam friends/haters
C{SpamTag}SPAMFRIEND SPAMHATER')')',
`dnl')

ifdef(`_ACCEPT_UNRESOLVABLE_DOMAINS_',`dnl',`dnl
# Resolve map (to check if a host exists in check_mail)
Kresolve host -a<OK> -T<TEMP>')

ifdef(`confCR_FILE', `dnl
# Hosts that will permit relaying ($=R)
FR`'confCR_FILE',
`dnl')


# who I send unqualified names to (null means deliver locally)
DR`'ifdef(`LOCAL_RELAY', LOCAL_RELAY)

# who gets all local email traffic ($R has precedence for unqualified names)
DH`'ifdef(`MAIL_HUB', MAIL_HUB)

# dequoting map
Kdequote dequote

divert(0)dnl	# end of nullclient diversion
# class E: names that should be exposed as from this host, even if we masquerade
# class L: names that should be delivered locally, even if we have a relay
# class M: domains that should be converted to $M
# class N: domains that should not be converted to $M
#CL root
undivert(5)dnl
ifdef(`_VIRTHOSTS_', `CR$={VirtHost}', `dnl')

# who I masquerade as (null for no masquerading) (see also $=M)
DM`'ifdef(`MASQUERADE_NAME', MASQUERADE_NAME)

# my name for error messages
ifdef(`confMAILER_NAME', `Dn`'confMAILER_NAME', `#DnMAILER-DAEMON')

undivert(6)dnl LOCAL_CONFIG
include(_CF_DIR_`m4/version.m4')

###############
#   Options   #
###############

# strip message body to 7 bits on input?
_OPTION(SevenBitInput, `confSEVEN_BIT_INPUT', `False')

# 8-bit data handling
_OPTION(EightBitMode, `confEIGHT_BIT_HANDLING', `adaptive')

# wait for alias file rebuild (default units: minutes)
_OPTION(AliasWait, `confALIAS_WAIT', `5m')

# location of alias file
_OPTION(AliasFile, `ALIAS_FILE', `MAIL_SETTINGS_DIR`'aliases')

# minimum number of free blocks on filesystem
_OPTION(MinFreeBlocks, `confMIN_FREE_BLOCKS', `100')

# maximum message size
_OPTION(MaxMessageSize, `confMAX_MESSAGE_SIZE', `1000000')

# substitution for space (blank) characters
_OPTION(BlankSub, `confBLANK_SUB', `_')

# avoid connecting to "expensive" mailers on initial submission?
_OPTION(HoldExpensive, `confCON_EXPENSIVE', `False')

# checkpoint queue runs after every N successful deliveries
_OPTION(CheckpointInterval, `confCHECKPOINT_INTERVAL', `10')

# default delivery mode
_OPTION(DeliveryMode, `confDELIVERY_MODE', `background')

# automatically rebuild the alias database?
# NOTE: There is a potential for a denial of service attack if this is set.
#       This option is deprecated and will be removed from a future version.
_OPTION(AutoRebuildAliases, `confAUTO_REBUILD', `False')

# error message header/file
_OPTION(ErrorHeader, `confERROR_MESSAGE', `MAIL_SETTINGS_DIR`'error-header')

# error mode
_OPTION(ErrorMode, `confERROR_MODE', `print')

# save Unix-style "From_" lines at top of header?
_OPTION(SaveFromLine, `confSAVE_FROM_LINES', `False')

# temporary file mode
_OPTION(TempFileMode, `confTEMP_FILE_MODE', `0600')

# match recipients against GECOS field?
_OPTION(MatchGECOS, `confMATCH_GECOS', `False')

# maximum hop count
_OPTION(MaxHopCount, `confMAX_HOP', `17')

# location of help file
O HelpFile=ifdef(`HELP_FILE', HELP_FILE, `MAIL_SETTINGS_DIR`'helpfile')

# ignore dots as terminators in incoming messages?
_OPTION(IgnoreDots, `confIGNORE_DOTS', `False')

# name resolver options
_OPTION(ResolverOptions, `confBIND_OPTS', `+AAONLY')

# deliver MIME-encapsulated error messages?
_OPTION(SendMimeErrors, `confMIME_FORMAT_ERRORS', `True')

# Forward file search path
_OPTION(ForwardPath, `confFORWARD_PATH', `/var/forward/$u:$z/.forward.$w:$z/.forward')

# open connection cache size
_OPTION(ConnectionCacheSize, `confMCI_CACHE_SIZE', `2')

# open connection cache timeout
_OPTION(ConnectionCacheTimeout, `confMCI_CACHE_TIMEOUT', `5m')

# persistent host status directory
_OPTION(HostStatusDirectory, `confHOST_STATUS_DIRECTORY', `.hoststat')

# single thread deliveries (requires HostStatusDirectory)?
_OPTION(SingleThreadDelivery, `confSINGLE_THREAD_DELIVERY', `False')

# use Errors-To: header?
_OPTION(UseErrorsTo, `confUSE_ERRORS_TO', `False')

# log level
_OPTION(LogLevel, `confLOG_LEVEL', `10')

# send to me too, even in an alias expansion?
_OPTION(MeToo, `confME_TOO', `True')

# verify RHS in newaliases?
_OPTION(CheckAliases, `confCHECK_ALIASES', `False')

# default messages to old style headers if no special punctuation?
_OPTION(OldStyleHeaders, `confOLD_STYLE_HEADERS', `False')

# SMTP daemon options
ifelse(defn(`confDAEMON_OPTIONS'), `', `dnl',
`errprint(WARNING: `confDAEMON_OPTIONS' is no longer valid.  See cf/README for more information.
)'dnl
`DAEMON_OPTIONS(`confDAEMON_OPTIONS')')
ifelse(defn(`_DPO_'), `', `O DaemonPortOptions=Name=MTA', `_DPO_')
ifdef(`_NO_MSA_', `dnl', `O DaemonPortOptions=Port=587, Name=MSA, M=E')

# SMTP client options
_OPTION(ClientPortOptions, `confCLIENT_OPTIONS', `Address=0.0.0.0')

# privacy flags
_OPTION(PrivacyOptions, `confPRIVACY_FLAGS', `authwarnings')

# who (if anyone) should get extra copies of error messages
_OPTION(PostmasterCopy, `confCOPY_ERRORS_TO', `Postmaster')

# slope of queue-only function
_OPTION(QueueFactor, `confQUEUE_FACTOR', `600000')

# queue directory
O QueueDirectory=ifdef(`QUEUE_DIR', QUEUE_DIR, `/var/spool/mqueue')

# timeouts (many of these)
_OPTION(Timeout.initial, `confTO_INITIAL', `5m')
_OPTION(Timeout.connect, `confTO_CONNECT', `5m')
_OPTION(Timeout.iconnect, `confTO_ICONNECT', `5m')
_OPTION(Timeout.helo, `confTO_HELO', `5m')
_OPTION(Timeout.mail, `confTO_MAIL', `10m')
_OPTION(Timeout.rcpt, `confTO_RCPT', `1h')
_OPTION(Timeout.datainit, `confTO_DATAINIT', `5m')
_OPTION(Timeout.datablock, `confTO_DATABLOCK', `1h')
_OPTION(Timeout.datafinal, `confTO_DATAFINAL', `1h')
_OPTION(Timeout.rset, `confTO_RSET', `5m')
_OPTION(Timeout.quit, `confTO_QUIT', `2m')
_OPTION(Timeout.misc, `confTO_MISC', `2m')
_OPTION(Timeout.command, `confTO_COMMAND', `1h')
_OPTION(Timeout.ident, `confTO_IDENT', `5s')
_OPTION(Timeout.fileopen, `confTO_FILEOPEN', `60s')
_OPTION(Timeout.control, `confTO_CONTROL', `2m')
_OPTION(Timeout.queuereturn, `confTO_QUEUERETURN', `5d')
_OPTION(Timeout.queuereturn.normal, `confTO_QUEUERETURN_NORMAL', `5d')
_OPTION(Timeout.queuereturn.urgent, `confTO_QUEUERETURN_URGENT', `2d')
_OPTION(Timeout.queuereturn.non-urgent, `confTO_QUEUERETURN_NONURGENT', `7d')
_OPTION(Timeout.queuewarn, `confTO_QUEUEWARN', `4h')
_OPTION(Timeout.queuewarn.normal, `confTO_QUEUEWARN_NORMAL', `4h')
_OPTION(Timeout.queuewarn.urgent, `confTO_QUEUEWARN_URGENT', `1h')
_OPTION(Timeout.queuewarn.non-urgent, `confTO_QUEUEWARN_NONURGENT', `12h')
_OPTION(Timeout.hoststatus, `confTO_HOSTSTATUS', `30m')
_OPTION(Timeout.resolver.retrans, `confTO_RESOLVER_RETRANS', `5s')
_OPTION(Timeout.resolver.retrans.first, `confTO_RESOLVER_RETRANS_FIRST', `5s')
_OPTION(Timeout.resolver.retrans.normal, `confTO_RESOLVER_RETRANS_NORMAL', `5s')
_OPTION(Timeout.resolver.retry, `confTO_RESOLVER_RETRY', `4')
_OPTION(Timeout.resolver.retry.first, `confTO_RESOLVER_RETRY_FIRST', `4')
_OPTION(Timeout.resolver.retry.normal, `confTO_RESOLVER_RETRY_NORMAL', `4')

# should we not prune routes in route-addr syntax addresses?
_OPTION(DontPruneRoutes, `confDONT_PRUNE_ROUTES', `False')

# queue up everything before forking?
_OPTION(SuperSafe, `confSAFE_QUEUE', `True')

# status file
O StatusFile=ifdef(`STATUS_FILE', `STATUS_FILE', `MAIL_SETTINGS_DIR`'statistics')

# time zone handling:
#  if undefined, use system default
#  if defined but null, use TZ envariable passed in
#  if defined and non-null, use that info
ifelse(confTIME_ZONE, `USE_SYSTEM', `#O TimeZoneSpec=',
	confTIME_ZONE, `USE_TZ', `O TimeZoneSpec=',
	`O TimeZoneSpec=confTIME_ZONE')

# default UID (can be username or userid:groupid)
_OPTION(DefaultUser, `confDEF_USER_ID', `mailnull')

# list of locations of user database file (null means no lookup)
_OPTION(UserDatabaseSpec, `confUSERDB_SPEC', `MAIL_SETTINGS_DIR`'userdb')

# fallback MX host
_OPTION(FallbackMXhost, `confFALLBACK_MX', `fall.back.host.net')

# if we are the best MX host for a site, try it directly instead of config err
_OPTION(TryNullMXList, `confTRY_NULL_MX_LIST', `False')

# load average at which we just queue messages
_OPTION(QueueLA, `confQUEUE_LA', `8')

# load average at which we refuse connections
_OPTION(RefuseLA, `confREFUSE_LA', `12')

# maximum number of children we allow at one time
_OPTION(MaxDaemonChildren, `confMAX_DAEMON_CHILDREN', `12')

# maximum number of new connections per second
_OPTION(ConnectionRateThrottle, `confCONNECTION_RATE_THROTTLE', `3')

# work recipient factor
_OPTION(RecipientFactor, `confWORK_RECIPIENT_FACTOR', `30000')

# deliver each queued job in a separate process?
_OPTION(ForkEachJob, `confSEPARATE_PROC', `False')

# work class factor
_OPTION(ClassFactor, `confWORK_CLASS_FACTOR', `1800')

# work time factor
_OPTION(RetryFactor, `confWORK_TIME_FACTOR', `90000')

# shall we sort the queue by hostname first?
_OPTION(QueueSortOrder, `confQUEUE_SORT_ORDER', `priority')

# minimum time in queue before retry
_OPTION(MinQueueAge, `confMIN_QUEUE_AGE', `30m')

# default character set
_OPTION(DefaultCharSet, `confDEF_CHAR_SET', `iso-8859-1')

# service switch file (ignored on Solaris, Ultrix, OSF/1, others)
_OPTION(ServiceSwitchFile, `confSERVICE_SWITCH_FILE', `MAIL_SETTINGS_DIR`'service.switch')

# hosts file (normally /etc/hosts)
_OPTION(HostsFile, `confHOSTS_FILE', `/etc/hosts')

# dialup line delay on connection failure
_OPTION(DialDelay, `confDIAL_DELAY', `10s')

# action to take if there are no recipients in the message
_OPTION(NoRecipientAction, `confNO_RCPT_ACTION', `add-to-undisclosed')

# chrooted environment for writing to files
_OPTION(SafeFileEnvironment, `confSAFE_FILE_ENV', `/arch')

# are colons OK in addresses?
_OPTION(ColonOkInAddr, `confCOLON_OK_IN_ADDR', `True')

# how many jobs can you process in the queue?
_OPTION(MaxQueueRunSize, `confMAX_QUEUE_RUN_SIZE', `10000')

# shall I avoid expanding CNAMEs (violates protocols)?
_OPTION(DontExpandCnames, `confDONT_EXPAND_CNAMES', `False')

# SMTP initial login message (old $e macro)
_OPTION(SmtpGreetingMessage, `confSMTP_LOGIN_MSG', `$j Sendmail $v ready at $b')

# UNIX initial From header format (old $l macro)
_OPTION(UnixFromLine, `confFROM_LINE', `From $g $d')

# From: lines that have embedded newlines are unwrapped onto one line
_OPTION(SingleLineFromHeader, `confSINGLE_LINE_FROM_HEADER', `False')

# Allow HELO SMTP command that does not `include' a host name
_OPTION(AllowBogusHELO, `confALLOW_BOGUS_HELO', `False')

# Characters to be quoted in a full name phrase (@,;:\()[] are automatic)
_OPTION(MustQuoteChars, `confMUST_QUOTE_CHARS', `.')

# delimiter (operator) characters (old $o macro)
_OPTION(OperatorChars, `confOPERATORS', `.:@[]')

# shall I avoid calling initgroups(3) because of high NIS costs?
_OPTION(DontInitGroups, `confDONT_INIT_GROUPS', `False')

# are group-writable `:include:' and .forward files (un)trustworthy?
_OPTION(UnsafeGroupWrites, `confUNSAFE_GROUP_WRITES', `True')

# where do errors that occur when sending errors get sent?
_OPTION(DoubleBounceAddress, `confDOUBLE_BOUNCE_ADDRESS', `postmaster')

# where to save bounces if all else fails
_OPTION(DeadLetterDrop, `confDEAD_LETTER_DROP', `/var/tmp/dead.letter')

# what user id do we assume for the majority of the processing?
_OPTION(RunAsUser, `confRUN_AS_USER', `sendmail')

# maximum number of recipients per SMTP envelope
_OPTION(MaxRecipientsPerMessage, `confMAX_RCPTS_PER_MESSAGE', `100')

# shall we get local names from our installed interfaces?
_OPTION(DontProbeInterfaces, `confDONT_PROBE_INTERFACES', `False')

# Return-Receipt-To: header implies DSN request
_OPTION(RrtImpliesDsn, `confRRT_IMPLIES_DSN', `False')

# override connection address (for testing)
_OPTION(ConnectOnlyTo, `confCONNECT_ONLY_TO', `0.0.0.0')

# Trusted user for file ownership and starting the daemon
_OPTION(TrustedUser, `confTRUSTED_USER', `root')

# Control socket for daemon management
_OPTION(ControlSocketName, `confCONTROL_SOCKET_NAME', `/var/spool/mqueue/.control')

# Maximum MIME header length to protect MUAs
_OPTION(MaxMimeHeaderLength, `confMAX_MIME_HEADER_LENGTH', `0/0')

# Maximum length of the sum of all headers
_OPTION(MaxHeadersLength, `confMAX_HEADERS_LENGTH', `32768')

# Maximum depth of alias recursion
_OPTION(MaxAliasRecursion, `confMAX_ALIAS_RECURSION', `10')

# location of pid file
_OPTION(PidFile, `confPID_FILE', `/var/run/sendmail.pid')

# Prefix string for the process title shown on 'ps' listings
_OPTION(ProcessTitlePrefix, `confPROCESS_TITLE_PREFIX', `prefix')

# Data file (df) memory-buffer file maximum size
_OPTION(DataFileBufferSize, `confDF_BUFFER_SIZE', `4096')

# Transcript file (xf) memory-buffer file maximum size
_OPTION(XscriptFileBufferSize, `confXF_BUFFER_SIZE', `4096')

# list of authentication mechanisms
_OPTION(AuthMechanisms, `confAUTH_MECHANISMS', `GSSAPI KERBEROS_V4 DIGEST-MD5 CRAM-MD5')

# default authentication information for outgoing connections
_OPTION(DefaultAuthInfo, `confDEF_AUTH_INFO', `MAIL_SETTINGS_DIR`'default-auth-info')

# SMTP AUTH flags
_OPTION(AuthOptions, `confAUTH_OPTIONS', `')

ifdef(`_FFR_MILTER', `
# Input mail filters
_OPTION(InputMailFilters, `confINPUT_MAIL_FILTERS', `')

# Milter options
_OPTION(Milter.macros.connect, `confMILTER_MACROS_CONNECT', `')
_OPTION(Milter.macros.helo, `confMILTER_MACROS_HELO', `')
_OPTION(Milter.macros.envfrom, `confMILTER_MACROS_ENVFROM', `')
_OPTION(Milter.macros.envrcpt, `confMILTER_MACROS_ENVRCPT', `')')


ifdef(`confQUEUE_FILE_MODE',
`# queue file mode (qf files)
O QueueFileMode=confQUEUE_FILE_MODE
')

###########################
#   Message precedences   #
###########################

Pfirst-class=0
Pspecial-delivery=100
Plist=-30
Pbulk=-60
Pjunk=-100

#####################
#   Trusted users   #
#####################

# this is equivalent to setting class "t"
ifdef(`_USE_CT_FILE_', `', `#')Ft`'ifdef(`confCT_FILE', confCT_FILE, `MAIL_SETTINGS_DIR`'trusted-users')
Troot
Tdaemon
ifdef(`_NO_UUCP_', `dnl', `Tuucp')
ifdef(`confTRUSTED_USERS', `T`'confTRUSTED_USERS', `dnl')

#########################
#   Format of headers   #
#########################

ifdef(`confFROM_HEADER',, `define(`confFROM_HEADER', `$?x$x <$g>$|$g$.')')dnl
H?P?Return-Path: <$g>
HReceived: confRECEIVED_HEADER
H?D?Resent-Date: $a
H?D?Date: $a
H?F?Resent-From: confFROM_HEADER
H?F?From: confFROM_HEADER
H?x?Full-Name: $x
# HPosted-Date: $a
# H?l?Received-Date: $b
H?M?Resent-Message-Id: <$t.$i@$j>
H?M?Message-Id: <$t.$i@$j>

#
######################################################################
######################################################################
#####
#####			REWRITING RULES
#####
######################################################################
######################################################################

############################################
###  Ruleset 3 -- Name Canonicalization  ###
############################################
Scanonify=3

# handle null input (translate to <@> special case)
R$@			$@ <@>

# strip group: syntax (not inside angle brackets!) and trailing semicolon
R$*			$: $1 <@>			mark addresses
R$* < $* > $* <@>	$: $1 < $2 > $3			unmark <addr>
R@ $* <@>		$: @ $1				unmark @host:...
R$* :: $* <@>		$: $1 :: $2			unmark node::addr
R:`include': $* <@>	$: :`include': $1			unmark :`include':...
R$* [ IPv6 $- ] <@>	$: $1 [ IPv6 $2 ]		unmark IPv6 addr
R$* : $* [ $* ]		$: $1 : $2 [ $3 ] <@>		remark if leading colon
R$* : $* <@>		$: $2				strip colon if marked
R$* <@>			$: $1				unmark
R$* ;			   $1				strip trailing semi
R$* < $* ; >		   $1 < $2 >			bogus bracketed semi

# null input now results from list:; syntax
R$@			$@ :; <@>

# strip angle brackets -- note RFC733 heuristic to get innermost item
R$*			$: < $1 >			housekeeping <>
R$+ < $* >		   < $2 >			strip excess on left
R< $* > $+		   < $1 >			strip excess on right
R<>			$@ < @ >			MAIL FROM:<> case
R< $+ >			$: $1				remove housekeeping <>

ifdef(`_USE_DEPRECATED_ROUTE_ADDR_',`dnl
# make sure <@a,@b,@c:user@d> syntax is easy to parse -- undone later
R@ $+ , $+		@ $1 : $2			change all "," to ":"

# localize and dispose of route-based addresses
R@ $+ : $+		$@ $>Canonify2 < @$1 > : $2	handle <route-addr>
dnl',`dnl
# strip route address <@a,@b,@c:user@d> -> <user@d>
R@ $+ , $+		$2
R@ $+ : $+		$2
dnl')

# find focus for list syntax
R $+ : $* ; @ $+	$@ $>Canonify2 $1 : $2 ; < @ $3 >	list syntax
R $+ : $* ;		$@ $1 : $2;			list syntax

# find focus for @ syntax addresses
R$+ @ $+		$: $1 < @ $2 >			focus on domain
R$+ < $+ @ $+ >		$1 $2 < @ $3 >			move gaze right
R$+ < @ $+ >		$@ $>Canonify2 $1 < @ $2 >	already canonical

# do some sanity checking
R$* < @ $* : $* > $*	$1 < @ $2 $3 > $4		nix colons in addrs

ifdef(`_NO_UUCP_', `dnl',
`# convert old-style addresses to a domain-based address
R$- ! $+		$@ $>Canonify2 $2 < @ $1 .UUCP >	resolve uucp names
R$+ . $- ! $+		$@ $>Canonify2 $3 < @ $1 . $2 >		domain uucps
R$+ ! $+		$@ $>Canonify2 $2 < @ $1 .UUCP >	uucp subdomains
')
ifdef(`_USE_DECNET_SYNTAX_',
`# convert node::user addresses into a domain-based address
R$- :: $+		$@ $>Canonify2 $2 < @ $1 .DECNET >	resolve DECnet names
R$- . $- :: $+		$@ $>Canonify2 $3 < @ $1.$2 .DECNET >	numeric DECnet addr
',
	`dnl')
# if we have % signs, take the rightmost one
R$* % $*		$1 @ $2				First make them all @s.
R$* @ $* @ $*		$1 % $2 @ $3			Undo all but the last.
R$* @ $*		$@ $>Canonify2 $1 < @ $2 >	Insert < > and finish

# else we must be a local name
R$*			$@ $>Canonify2 $1


################################################
###  Ruleset 96 -- bottom half of ruleset 3  ###
################################################

SCanonify2=96

# handle special cases for local names
R$* < @ localhost > $*		$: $1 < @ $j . > $2		no domain at all
R$* < @ localhost . $m > $*	$: $1 < @ $j . > $2		local domain
ifdef(`_NO_UUCP_', `dnl',
`R$* < @ localhost . UUCP > $*	$: $1 < @ $j . > $2		.UUCP domain')

# check for IPv6 domain literal (save quoted form)
R$* < @ [ IPv6 $- ] > $*	$: $2 $| $1 < @@ [ $(dequote $2 $) ] > $3	mark IPv6 addr
R$- $| $* < @@ $=w > $*		$: $2 < @ $j . > $4		self-literal
R$- $| $* < @@ [ $+ ] > $*	$@ $2 < @ [ IPv6 $1 ] > $4	canon IP addr

# check for IPv4 domain literal
R$* < @ [ $+ ] > $*		$: $1 < @@ [ $2 ] > $3		mark [a.b.c.d]
R$* < @@ $=w > $*		$: $1 < @ $j . > $3		self-literal
R$* < @@ $+ > $*		$@ $1 < @ $2 > $3		canon IP addr

ifdef(`_DOMAIN_TABLE_', `dnl
# look up domains in the domain table
R$* < @ $+ > $* 		$: $1 < @ $(domaintable $2 $) > $3', `dnl')

undivert(2)dnl LOCAL_RULE_3

ifdef(`_BITDOMAIN_TABLE_', `dnl
# handle BITNET mapping
R$* < @ $+ .BITNET > $*		$: $1 < @ $(bitdomain $2 $: $2.BITNET $) > $3', `dnl')

ifdef(`_UUDOMAIN_TABLE_', `dnl
# handle UUCP mapping
R$* < @ $+ .UUCP > $*		$: $1 < @ $(uudomain $2 $: $2.UUCP $) > $3', `dnl')

ifdef(`_NO_UUCP_', `dnl',
`ifdef(`UUCP_RELAY',
`# pass UUCP addresses straight through
R$* < @ $+ . UUCP > $*		$@ $1 < @ $2 . UUCP . > $3',
`# if really UUCP, handle it immediately
ifdef(`_CLASS_U_',
`R$* < @ $=U . UUCP > $*	$@ $1 < @ $2 . UUCP . > $3', `dnl')
ifdef(`_CLASS_V_',
`R$* < @ $=V . UUCP > $*	$@ $1 < @ $2 . UUCP . > $3', `dnl')
ifdef(`_CLASS_W_',
`R$* < @ $=W . UUCP > $*	$@ $1 < @ $2 . UUCP . > $3', `dnl')
ifdef(`_CLASS_X_',
`R$* < @ $=X . UUCP > $*	$@ $1 < @ $2 . UUCP . > $3', `dnl')
ifdef(`_CLASS_Y_',
`R$* < @ $=Y . UUCP > $*	$@ $1 < @ $2 . UUCP . > $3', `dnl')

ifdef(`_NO_CANONIFY_', `dnl', `dnl
# try UUCP traffic as a local address
R$* < @ $+ . UUCP > $*		$: $1 < @ $[ $2 $] . UUCP . > $3
R$* < @ $+ . . UUCP . > $*	$@ $1 < @ $2 . > $3')
')')
# hostnames ending in class P are always canonical
R$* < @ $* $=P > $*		$: $1 < @ $2 $3 . > $4
dnl apply the next rule only for hostnames not in class P
dnl this even works for phrases in class P since . is in class P
dnl which daemon flags are set?
R$* < @ $* $~P > $*		$: $&{daemon_flags} $| $1 < @ $2 $3 > $4
dnl the other rules in this section only apply if the hostname
dnl does not end in class P hence no further checks are done here
dnl if this ever changes make sure the lookups are "protected" again!
ifdef(`_NO_CANONIFY_', `dnl
dnl do not canonify unless:
dnl domain ends in class {Canonify} (this does not work if the intersection
dnl	with class P is non-empty)
dnl or {daemon_flags} has c set
# pass to name server to make hostname canonical if in class {Canonify}
R$* $| $* < @ $* $={Canonify} > $*	$: $2 < @ $[ $3 $4 $] > $5
# pass to name server to make hostname canonical if requested
R$* c $* $| $* < @ $* > $*	$: $3 < @ $[ $4 $] > $5
dnl trailing dot? -> do not apply _CANONIFY_HOSTS_
R$* $| $* < @ $+ . > $*		$: $2 < @ $3 . > $4
# add a trailing dot to qualified hostnames so other rules will work
R$* $| $* < @ $+.$+ > $*	$: $2 < @ $3.$4 . > $5
ifdef(`_CANONIFY_HOSTS_', `dnl
dnl this should only apply to unqualified hostnames
dnl but if a valid character inside an unqualified hostname is an OperatorChar
dnl then $- does not work.
# lookup unqualified hostnames
R$* $| $* < @ $* > $*	$: $2 < @ $[ $3 $] > $4', `dnl')', `dnl
dnl _NO_CANONIFY_ is not set: canonify unless:
dnl {daemon_flags} contains CC (do not canonify)
R$* CC $* $| $*			$: $3
# pass to name server to make hostname canonical
R$* $| $* < @ $* > $*		$: $2 < @ $[ $3 $] > $4')
dnl remove {daemon_flags} for other cases
R$* $| $*			$: $2

# local host aliases and pseudo-domains are always canonical
R$* < @ $=w > $*		$: $1 < @ $2 . > $3
ifdef(`_MASQUERADE_ENTIRE_DOMAIN_',
`R$* < @ $* $=M > $*		$: $1 < @ $2 $3 . > $4',
`R$* < @ $=M > $*		$: $1 < @ $2 . > $3')
ifdef(`_VIRTUSER_TABLE_', `dnl
dnl virtual hosts are also canonical
ifdef(`_VIRTUSER_ENTIRE_DOMAIN_',
`R$* < @ $* $={VirtHost} > $* 	$: $1 < @ $2 $3 . > $4',
`R$* < @ $={VirtHost} > $* 	$: $1 < @ $2 . > $3')',
`dnl')
dnl remove superfluous dots (maybe repeatedly) which may have been added
dnl by one of the rules before
R$* < @ $* . . > $*		$1 < @ $2 . > $3


##################################################
###  Ruleset 4 -- Final Output Post-rewriting  ###
##################################################
Sfinal=4

R$* <@>			$@				handle <> and list:;

# strip trailing dot off possibly canonical name
R$* < @ $+ . > $*	$1 < @ $2 > $3

# eliminate internal code
R$* < @ *LOCAL* > $*	$1 < @ $j > $2

# externalize local domain info
R$* < $+ > $*		$1 $2 $3			defocus
R@ $+ : @ $+ : $+	@ $1 , @ $2 : $3		<route-addr> canonical
R@ $*			$@ @ $1				... and exit

ifdef(`_NO_UUCP_', `dnl',
`# UUCP must always be presented in old form
R$+ @ $- . UUCP		$2!$1				u@h.UUCP => h!u')

ifdef(`_USE_DECNET_SYNTAX_',
`# put DECnet back in :: form
R$+ @ $+ . DECNET	$2 :: $1			u@h.DECNET => h::u',
	`dnl')
# delete duplicate local names
R$+ % $=w @ $=w		$1 @ $2				u%host@host => u@host



##############################################################
###   Ruleset 97 -- recanonicalize and call ruleset zero   ###
###		   (used for recursive calls)		   ###
##############################################################

SRecurse=97
R$*			$: $>canonify $1
R$*			$@ $>parse $1


######################################
###   Ruleset 0 -- Parse Address   ###
######################################

Sparse=0

R$*			$: $>Parse0 $1		initial parsing
R<@>			$#_LOCAL_ $: <@>		special case error msgs
R$*			$: $>ParseLocal $1	handle local hacks
R$*			$: $>Parse1 $1		final parsing

#
#  Parse0 -- do initial syntax checking and eliminate local addresses.
#	This should either return with the (possibly modified) input
#	or return with a #error mailer.  It should not return with a
#	#mailer other than the #error mailer.
#

SParse0
R<@>			$@ <@>			special case error msgs
R$* : $* ; <@>		$#error $@ 5.1.3 $: "553 List:; syntax illegal for recipient addresses"
R@ <@ $* >		< @ $1 >		catch "@@host" bogosity
R<@ $+>			$#error $@ 5.1.3 $: "553 User address required"
R$*			$: <> $1
R<> $* < @ [ $+ ] > $*	$1 < @ [ $2 ] > $3
R<> $* <$* : $* > $*	$#error $@ 5.1.3 $: "553 Colon illegal in host name part"
R<> $*			$1
R$* < @ . $* > $*	$#error $@ 5.1.2 $: "553 Invalid host name"
R$* < @ $* .. $* > $*	$#error $@ 5.1.2 $: "553 Invalid host name"

# now delete the local info -- note $=O to find characters that cause forwarding
R$* < @ > $*		$@ $>Parse0 $>canonify $1	user@ => user
R< @ $=w . > : $*	$@ $>Parse0 $>canonify $2	@here:... -> ...
R$- < @ $=w . >		$: $(dequote $1 $) < @ $2 . >	dequote "foo"@here
R< @ $+ >		$#error $@ 5.1.3 $: "553 User address required"
R$* $=O $* < @ $=w . >	$@ $>Parse0 $>canonify $1 $2 $3	...@here -> ...
R$- 			$: $(dequote $1 $) < @ *LOCAL* >	dequote "foo"
R< @ *LOCAL* >		$#error $@ 5.1.3 $: "553 User address required"
R$* $=O $* < @ *LOCAL* >
			$@ $>Parse0 $>canonify $1 $2 $3	...@*LOCAL* -> ...
R$* < @ *LOCAL* >	$: $1

#
#  Parse1 -- the bottom half of ruleset 0.
#

SParse1
ifdef(`_LDAP_ROUTING_', `dnl
# handle LDAP routing for hosts in $={LDAPRoute}
R$+ < @ $={LDAPRoute} . >	$: $>LDAPExpand <$1 < @ $2 . >> <$1 @ $2>',
`dnl')

ifdef(`_MAILER_smtp_',
`# handle numeric address spec
dnl there is no check whether this is really an IP number
R$* < @ [ $+ ] > $*	$: $>ParseLocal $1 < @ [ $2 ] > $3	numeric internet spec
R$* < @ [ $+ ] > $*	$1 < @ [ $2 ] : $S > $3		Add smart host to path
R$* < @ [ IPv6 $- ] : > $*
		$#_SMTP_ $@ [ $(dequote $2 $) ] $: $1 < @ [IPv6 $2 ] > $3	no smarthost: send
R$* < @ [ $+ ] : > $*	$#_SMTP_ $@ [$2] $: $1 < @ [$2] > $3	no smarthost: send
R$* < @ [ $+ ] : $- : $*> $*	$#$3 $@ $4 $: $1 < @ [$2] > $5	smarthost with mailer
R$* < @ [ $+ ] : $+ > $*	$#_SMTP_ $@ $3 $: $1 < @ [$2] > $4	smarthost without mailer',
	`dnl')

ifdef(`_VIRTUSER_TABLE_', `dnl
# handle virtual users
R$+			$: <!> $1		Mark for lookup
ifdef(`_VIRTUSER_ENTIRE_DOMAIN_',
`R<!> $+ < @ $* $={VirtHost} . > 	$: < $(virtuser $1 @ $2 $3 $@ $1 $: @ $) > $1 < @ $2 $3 . >',
`R<!> $+ < @ $={VirtHost} . > 	$: < $(virtuser $1 @ $2 $@ $1 $: @ $) > $1 < @ $2 . >')
R<!> $+ < @ $=w . > 	$: < $(virtuser $1 @ $2 $@ $1 $: @ $) > $1 < @ $2 . >
R<@> $+ + $* < @ $* . >
			$: < $(virtuser $1 + * @ $3 $@ $1 $@ $2 $: @ $) > $1 + $2 < @ $3 . >
R<@> $+ + $* < @ $* . >
			$: < $(virtuser $1 @ $3 $@ $1 $: @ $) > $1 + $2 < @ $3 . >
dnl try default entry: @domain
dnl +*@domain
R<@> $+ + $+ < @ $+ . >	$: < $(virtuser + * @ $3 $@ $1 $@ $2 $: @ $) > $1 + $2 < @ $3 . >
dnl @domain if +detail exists
R<@> $+ + $* < @ $+ . >	$: < $(virtuser @ $3 $@ $1 $@ $2 $: @ $) > $1 + $2 < @ $3 . >
dnl without +detail (or no match)
R<@> $+ < @ $+ . >	$: < $(virtuser @ $2 $@ $1 $: @ $) > $1 < @ $2 . >
R<@> $+			$: $1
R<!> $+			$: $1
R< error : $-.$-.$- : $+ > $* 	$#error $@ $1.$2.$3 $: $4
R< error : $- $+ > $* 	$#error $@ $(dequote $1 $) $: $2
R< $+ > $+ < @ $+ >	$: $>Recurse $1',
`dnl')

# short circuit local delivery so forwarded email works
ifdef(`_MAILER_usenet_', `dnl
R$+ . USENET < @ $=w . >	$#usenet $@ usenet $: $1	handle usenet specially', `dnl')
ifdef(`_STICKY_LOCAL_DOMAIN_',
`R$+ < @ $=w . >		$: < $H > $1 < @ $2 . >		first try hub
R< $+ > $+ < $+ >	$>MailerToTriple < $1 > $2 < $3 >	yep ....
dnl $H empty (but @$=w.)
R< > $+ + $* < $+ >	$#_LOCAL_ $: $1 + $2		plussed name?
R< > $+ < $+ >		$#_LOCAL_ $: @ $1			nope, local address',
`R$=L < @ $=w . >	$#_LOCAL_ $: @ $1			special local names
R$+ < @ $=w . >		$#_LOCAL_ $: $1			regular local name')

ifdef(`_MAILER_TABLE_', `dnl
# not local -- try mailer table lookup
R$* <@ $+ > $*		$: < $2 > $1 < @ $2 > $3	extract host name
R< $+ . > $*		$: < $1 > $2			strip trailing dot
R< $+ > $*		$: < $(mailertable $1 $) > $2	lookup
dnl it is $~[ instead of $- to avoid matches on IPv6 addresses
R< $~[ : $* > $* 	$>MailerToTriple < $1 : $2 > $3		check -- resolved?
R< $+ > $*		$: $>Mailertable <$1> $2		try domain',
`dnl')
undivert(4)dnl UUCP rules from `MAILER(uucp)'

ifdef(`_NO_UUCP_', `dnl',
`# resolve remotely connected UUCP links (if any)
ifdef(`_CLASS_V_',
`R$* < @ $=V . UUCP . > $*		$: $>MailerToTriple < $V > $1 <@$2.UUCP.> $3',
	`dnl')
ifdef(`_CLASS_W_',
`R$* < @ $=W . UUCP . > $*		$: $>MailerToTriple < $W > $1 <@$2.UUCP.> $3',
	`dnl')
ifdef(`_CLASS_X_',
`R$* < @ $=X . UUCP . > $*		$: $>MailerToTriple < $X > $1 <@$2.UUCP.> $3',
	`dnl')')

# resolve fake top level domains by forwarding to other hosts
ifdef(`BITNET_RELAY',
`R$*<@$+.BITNET.>$*	$: $>MailerToTriple < $B > $1 <@$2.BITNET.> $3	user@host.BITNET',
	`dnl')
ifdef(`DECNET_RELAY',
`R$*<@$+.DECNET.>$*	$: $>MailerToTriple < $C > $1 <@$2.DECNET.> $3	user@host.DECNET',
	`dnl')
ifdef(`_MAILER_pop_',
`R$+ < @ POP. >		$#pop $: $1			user@POP',
	`dnl')
ifdef(`_MAILER_fax_',
`R$+ < @ $+ .FAX. >	$#fax $@ $2 $: $1		user@host.FAX',
`ifdef(`FAX_RELAY',
`R$*<@$+.FAX.>$*		$: $>MailerToTriple < $F > $1 <@$2.FAX.> $3	user@host.FAX',
	`dnl')')

ifdef(`UUCP_RELAY',
`# forward non-local UUCP traffic to our UUCP relay
R$*<@$*.UUCP.>$*		$: $>MailerToTriple < $Y > $1 <@$2.UUCP.> $3	uucp mail',
`ifdef(`_MAILER_uucp_',
`# forward other UUCP traffic straight to UUCP
R$* < @ $+ .UUCP. > $*		$#_UUCP_ $@ $2 $: $1 < @ $2 .UUCP. > $3	user@host.UUCP',
	`dnl')')
ifdef(`_MAILER_usenet_', `
# addresses sent to net.group.USENET will get forwarded to a newsgroup
R$+ . USENET		$#usenet $@ usenet $: $1',
	`dnl')

ifdef(`_LOCAL_RULES_',
`# figure out what should stay in our local mail system
undivert(1)', `dnl')

# pass names that still have a host to a smarthost (if defined)
R$* < @ $* > $*		$: $>MailerToTriple < $S > $1 < @ $2 > $3	glue on smarthost name

# deal with other remote names
ifdef(`_MAILER_smtp_',
`R$* < @$* > $*		$#_SMTP_ $@ $2 $: $1 < @ $2 > $3	user@host.domain',
`R$* < @$* > $*		$#error $@ 5.1.2 $: "553 Unrecognized host name " $2')

# handle locally delivered names
R$=L			$#_LOCAL_ $: @ $1		special local names
R$+			$#_LOCAL_ $: $1			regular local names

###########################################################################
###   Ruleset 5 -- special rewriting after aliases have been expanded   ###
###########################################################################

SLocal_localaddr
Slocaladdr=5
R$+			$: $1 $| $>"Local_localaddr" $1
R$+ $| $#$*		$#$2
R$+ $| $*		$: $1

# deal with plussed users so aliases work nicely
R$+ + *			$#_LOCAL_ $@ $&h $: $1
R$+ + $*		$#_LOCAL_ $@ + $2 $: $1 + *

# prepend an empty "forward host" on the front
R$+			$: <> $1

ifdef(`LUSER_RELAY', `dnl
# send unrecognized local users to a relay host
R< > $+ 		$: < $L > $(user $1 $)		look up user
R< $* > $+ <>		$: < > $2			found; strip $L',
`dnl')

# see if we have a relay or a hub
R< > $+			$: < $H > $1			try hub
R< > $+			$: < $R > $1			try relay
R< > $+			$: < > < $1 <> $&h >		nope, restore +detail
R< > < $+ <> + $* >	$: < > < $1 + $2 >		check whether +detail
R< > < $+ <> $* >	$: < > < $1 >			else discard
R< > < $+ + $* > $*	   < > < $1 > + $2 $3		find the user part
R< > < $+ > + $*	$#_LOCAL_ $@ $2 $: @ $1		strip the extra +
R< > < $+ >		$@ $1				no +detail
R$+			$: $1 <> $&h			add +detail back in
R$+ <> + $*		$: $1 + $2			check whether +detail
R$+ <> $*		$: $1				else discard
R< local : $* > $*	$: $>MailerToTriple < local : $1 > $2	no host extension
R< error : $* > $*	$: $>MailerToTriple < error : $1 > $2	no host extension
R< $- : $+ > $+		$: $>MailerToTriple < $1 : $2 > $3 < @ $2 >
R< $+ > $+		$@ $>MailerToTriple < $1 > $2 < @ $1 >

ifdef(`_MAILER_TABLE_', `dnl
###################################################################
###  Ruleset 90 -- try domain part of mailertable entry 	###
dnl input: LeftPartOfDomain <RightPartOfDomain> FullAddress
###################################################################

SMailertable=90
dnl shift and check
dnl %2 is not documented in cf/README
R$* <$- . $+ > $*	$: $1$2 < $(mailertable .$3 $@ $1$2 $@ $2 $) > $4
dnl it is $~[ instead of $- to avoid matches on IPv6 addresses
R$* <$~[ : $* > $*	$>MailerToTriple < $2 : $3 > $4		check -- resolved?
R$* < . $+ > $* 	$@ $>Mailertable $1 . <$2> $3		no -- strip & try again
dnl is $2 always empty?
R$* < $* > $*		$: < $(mailertable . $@ $1$2 $) > $3	try "."
R< $~[ : $* > $*	$>MailerToTriple < $1 : $2 > $3		"." found?
dnl return full address
R< $* > $*		$@ $2				no mailertable match',
`dnl')

###################################################################
###  Ruleset 95 -- canonify mailer:[user@]host syntax to triple	###
dnl input: in general: <[mailer:]host> lp<@domain>rest
dnl	<> address				-> address
dnl	<error:d.s.n:text>			-> error
dnl	<error:text>				-> error
dnl	<mailer:user@host> lp<@domain>rest	-> mailer host user
dnl	<mailer:host> address			-> mailer host address
dnl	<localdomain> address			-> address
dnl	<[IPv6 number]> address			-> relay number address
dnl	<host> address				-> relay host address
###################################################################

SMailerToTriple=95
R< > $*				$@ $1			strip off null relay
R< error : $-.$-.$- : $+ > $* 	$#error $@ $1.$2.$3 $: $4
R< error : $- $+ > $*		$#error $@ $(dequote $1 $) $: $2
R< local : $* > $*		$>CanonLocal < $1 > $2
R< $- : $+ @ $+ > $*<$*>$*	$# $1 $@ $3 $: $2<@$3>	use literal user
R< $- : $+ > $*			$# $1 $@ $2 $: $3	try qualified mailer
R< $=w > $*			$@ $2			delete local host
R< [ IPv6 $+ ] > $*		$#_RELAY_ $@ $(dequote $1 $) $: $2	use unqualified mailer
R< $+ > $*			$#_RELAY_ $@ $1 $: $2	use unqualified mailer

###################################################################
###  Ruleset CanonLocal -- canonify local: syntax		###
dnl input: <user> address
dnl <x> <@host> : rest			-> Recurse rest
dnl <x> p1 $=O p2 <@host>		-> Recurse p1 $=O p2
dnl <> user <@host> rest		-> local user@host user
dnl <> user				-> local user user
dnl <user@host> lp <@domain> rest	-> <user> lp <@host> [cont]
dnl <user> lp <@host> rest		-> local lp@host user
dnl <user> lp				-> local lp user
###################################################################

SCanonLocal
# strip local host from routed addresses
R< $* > < @ $+ > : $+		$@ $>Recurse $3
R< $* > $+ $=O $+ < @ $+ >	$@ $>Recurse $2 $3 $4

# strip trailing dot from any host name that may appear
R< $* > $* < @ $* . >		$: < $1 > $2 < @ $3 >

# handle local: syntax -- use old user, either with or without host
R< > $* < @ $* > $*		$#_LOCAL_ $@ $1@$2 $: $1
R< > $+				$#_LOCAL_ $@ $1    $: $1

# handle local:user@host syntax -- ignore host part
R< $+ @ $+ > $* < @ $* >	$: < $1 > $3 < @ $4 >

# handle local:user syntax
R< $+ > $* <@ $* > $*		$#_LOCAL_ $@ $2@$3 $: $1
R< $+ > $* 			$#_LOCAL_ $@ $2    $: $1

###################################################################
###  Ruleset 93 -- convert header names to masqueraded form	###
###################################################################

SMasqHdr=93

ifdef(`_GENERICS_TABLE_', `dnl
# handle generics database
ifdef(`_GENERICS_ENTIRE_DOMAIN_',
dnl if generics should be applied add a @ as mark
`R$+ < @ $* $=G . >	$: < $1@$2$3 > $1 < @ $2$3 . > @	mark',
`R$+ < @ $=G . >	$: < $1@$2 > $1 < @ $2 . > @	mark')
R$+ < @ *LOCAL* >	$: < $1@$j > $1 < @ *LOCAL* > @	mark
dnl workspace: either user<@domain> or <user@domain> user <@domain> @
dnl ignore the first case for now
dnl if it has the mark lookup full address
R< $+ > $+ < $* > @	$: < $(generics $1 $: @ $1 $) > $2 < $3 >
dnl workspace: ... or <match|@user@domain> user <@domain>
dnl no match, try user+detail@domain
R<@$+ + $* @ $+> $+ < @ $+ >
		$: < $(generics $1+*@$3 $@ $2 $:@$1 + $2@$3 $) >  $4 < @ $5 >
R<@$+ + $* @ $+> $+ < @ $+ >
		$: < $(generics $1@$3 $: $) > $4 < @ $5 >
dnl no match, remove mark
R<@$+ > $+ < @ $+ >	$: < > $2 < @ $3 >
dnl no match, try @domain for exceptions
R< > $+ < @ $+ . >	$: < $(generics @$2 $@ $1 $: $) > $1 < @ $2 . >
dnl workspace: ... or <match> user <@domain>
dnl no match, try local part
R< > $+ < @ $+ > 	$: < $(generics $1 $: $) > $1 < @ $2 >
R< > $+ + $* < @ $+ > 	$: < $(generics $1+* $@ $2 $: $) > $1 + $2 < @ $3 >
R< > $+ + $* < @ $+ > 	$: < $(generics $1 $: $) > $1 + $2 < @ $3 >
R< $* @ $* > $* < $* >	$@ $>canonify $1 @ $2		found qualified
R< $+ > $* < $* >	$: $>canonify $1 @ *LOCAL*	found unqualified
R< > $*			$: $1				not found',
`dnl')

# do not masquerade anything in class N
R$* < @ $* $=N . >	$@ $1 < @ $2 $3 . >

# special case the users that should be exposed
R$=E < @ *LOCAL* >	$@ $1 < @ $j . >		leave exposed
ifdef(`_MASQUERADE_ENTIRE_DOMAIN_',
`R$=E < @ $* $=M . >	$@ $1 < @ $2 $3 . >',
`R$=E < @ $=M . >	$@ $1 < @ $2 . >')
ifdef(`_LIMITED_MASQUERADE_', `dnl',
`R$=E < @ $=w . >	$@ $1 < @ $2 . >')

# handle domain-specific masquerading
ifdef(`_MASQUERADE_ENTIRE_DOMAIN_',
`R$* < @ $* $=M . > $*	$: $1 < @ $2 $3 . @ $M > $4	convert masqueraded doms',
`R$* < @ $=M . > $*	$: $1 < @ $2 . @ $M > $3	convert masqueraded doms')
ifdef(`_LIMITED_MASQUERADE_', `dnl',
`R$* < @ $=w . > $*	$: $1 < @ $2 . @ $M > $3')
R$* < @ *LOCAL* > $*	$: $1 < @ $j . @ $M > $2
R$* < @ $+ @ > $*	$: $1 < @ $2 > $3		$M is null
R$* < @ $+ @ $+ > $*	$: $1 < @ $3 . > $4		$M is not null

###################################################################
###  Ruleset 94 -- convert envelope names to masqueraded form	###
###################################################################

SMasqEnv=94
ifdef(`_MASQUERADE_ENVELOPE_',
`R$+			$@ $>MasqHdr $1',
`R$* < @ *LOCAL* > $*	$: $1 < @ $j . > $2')

###################################################################
###  Ruleset 98 -- local part of ruleset zero (can be null)	###
###################################################################

SParseLocal=98
undivert(3)dnl LOCAL_RULE_0

ifdef(`_LDAP_ROUTING_', `dnl
SLDAPExpand
# do the LDAP lookups
R<$+><$+>
	$: <$(ldap_mailroutingaddress $2 $: $)> <$(ldap_mailhost $2 $: $)> <$1> <$2>

# if mailRoutingAddress and local or non-existant mailHost,
# return the new mailRoutingAddress
R< $+ > < $=w > < $+ > < $+ >	$@ $>Parse0 $>canonify $1
R< $+ > <  > < $+ > < $+ >	$@ $>Parse0 $>canonify $1

# if mailRoutingAddress and non-local mailHost,
# relay to mailHost with new mailRoutingAddress
R< $+ > < $+ > < $+ > < $+ >	$#_RELAY_ $@ $2 $: $>canonify $1

# if no mailRoutingAddress and local mailHost,
# return original address
R< > < $=w > <$+> <$+>		$@ $2

# if no mailRoutingAddress and non-local mailHost,
# relay to mailHost with original address
R< > < $+ > <$+> <$+>		$#_RELAY_ $@ $1 $: $2

# if no mailRoutingAddress and no mailHost,
# try @domain
R< > < > <$+> <$+ @ $+>		$@ $>LDAPExpand <$1> <@ $3>

# if no mailRoutingAddress and no mailHost and this was a domain attempt,
ifelse(_LDAP_ROUTING_, `_MUST_EXIST_', `dnl
# user does not exist
R< > < > <$+> <@ $+>		$#error $@ nouser $: "550 User unknown"',
`dnl
# return the original address
R< > < > <$+> <@ $+>		$@ $1')',
`dnl')

ifelse(substr(confDELIVERY_MODE,0,1), `d', `errprint(`WARNING: Antispam rules not available in deferred delivery mode.
')')
ifdef(`_ACCESS_TABLE_', `dnl
######################################################################
###  LookUpDomain -- search for domain in access database
###
###	Parameters:
###		<$1> -- key (domain name)
###		<$2> -- default (what to return if not found in db)
dnl			must not be empty
###		<$3> -- passthru (additional data passed unchanged through)
###		<$4> -- mark (must be <(!|+) single-token>)
###			! does lookup only with tag
###			+ does lookup with and without tag
dnl returns:		<default> <passthru>
dnl 			<result> <passthru>
######################################################################

SLookUpDomain
dnl remove IPv6 mark and dequote address
dnl it is a bit ugly because it is checked on each "iteration"
R<[IPv6 $-]> <$+> <$*> <$*>	$: <[$(dequote $1 $)]> <$2> <$3> <$4>
dnl workspace <key> <default> <passthru> <mark>
dnl lookup with tag (in front, no delimiter here)
R<$*> <$+> <$*> <$- $->		$: < $(access $5`'_TAG_DELIM_`'$1 $: ? $) > <$1> <$2> <$3> <$4 $5>
dnl workspace <result-of-lookup|?> <key> <default> <passthru> <mark>
ifdef(`_FFR_LOOKUPDOTDOMAIN', `dnl omit first component: lookup .rest
R<?> <$+.$+> <$+> <$*> <$- $->	$: < $(access $5`'_TAG_DELIM_`'.$2 $: ? $) > <$1.$2> <$3> <$4> <$5 $6>', `dnl')
dnl lookup without tag?
R<?> <$+> <$+> <$*> <+ $*>	$: < $(access $1 $: ? $) > <$1> <$2> <$3> <+ $4>
ifdef(`_FFR_LOOKUPDOTDOMAIN', `dnl omit first component: lookup .rest
R<?> <$+.$+> <$+> <$*> <+ $*>	$: < $(access .$2 $: ? $) > <$1.$2> <$3> <$4> <+ $5>', `dnl')
dnl lookup IP address (no check is done whether it is an IP number!)
R<?> <[$+.$-]> <$+> <$*> <$*>	$@ $>LookUpDomain <[$1]> <$3> <$4> <$5>
dnl lookup IPv6 address
R<?> <[$+:$-]> <$+> <$*> <$*>	$: $>LookUpDomain <[$1]> <$3> <$4> <$5>
dnl not found, but subdomain: try again
R<?> <$+.$+> <$+> <$*> <$*>	$@ $>LookUpDomain <$2> <$3> <$4> <$5>
dnl not found, no subdomain: return default
R<?> <$+> <$+> <$*> <$*>	$@ <$2> <$3>
dnl return result of lookup
R<$*> <$+> <$+> <$*> <$*>	$@ <$1> <$4>

######################################################################
###  LookUpAddress -- search for host address in access database
###
###	Parameters:
###		<$1> -- key (dot quadded host address)
###		<$2> -- default (what to return if not found in db)
dnl			must not be empty
###		<$3> -- passthru (additional data passed through)
###		<$4> -- mark (must be <(!|+) single-token>)
###			! does lookup only with tag
###			+ does lookup with and without tag
dnl	returns:	<default> <passthru>
dnl			<result> <passthru>
######################################################################

SLookUpAddress
dnl lookup with tag
R<$+> <$+> <$*> <$- $+>		$: < $(access $5`'_TAG_DELIM_`'$1 $: ? $) > <$1> <$2> <$3> <$4 $5>
dnl lookup without tag
R<?> <$+> <$+> <$*> <+ $+>	$: < $(access $1 $: ? $) > <$1> <$2> <$3> <+ $4>
dnl no match; IPv6: remove last part
R<?> <$+:$-> <$+> <$*> <$*>	$: $>LookUpAddress <$1> <$3> <$4> <$5>
dnl no match; IPv4: remove last part
R<?> <$+.$-> <$+> <$*> <$*>	$@ $>LookUpAddress <$1> <$3> <$4> <$5>
dnl no match: return default
R<?> <$+> <$+> <$*> <$*>	$@ <$2> <$3>
dnl match: return result
R<$*> <$+> <$+> <$*> <$*>	$@ <$1> <$4>',
`dnl')

######################################################################
###  CanonAddr --	Convert an address into a standard form for
###			relay checking.  Route address syntax is
###			crudely converted into a %-hack address.
###
###	Parameters:
###		$1 -- full recipient address
###
###	Returns:
###		parsed address, not in source route form
dnl		user%host%host<@domain>
dnl		host!user<@domain>
######################################################################

SCanonAddr
R$*			$: $>Parse0 $>canonify $1	make domain canonical
ifdef(`_USE_DEPRECATED_ROUTE_ADDR_',`dnl
R< @ $+ > : $* @ $*	< @ $1 > : $2 % $3	change @ to % in src route
R$* < @ $+ > : $* : $*	$3 $1 < @ $2 > : $4	change to % hack.
R$* < @ $+ > : $*	$3 $1 < @ $2 >
dnl')

######################################################################
###  ParseRecipient --	Strip off hosts in $=R as well as possibly
###			$* $=m or the access database.
###			Check user portion for host separators.
###
###	Parameters:
###		$1 -- full recipient address
###
###	Returns:
###		parsed, non-local-relaying address
######################################################################

SParseRecipient
dnl mark and canonify address
R$*				$: <?> $>CanonAddr $1
dnl workspace: <?> localpart<@domain[.]>
R<?> $* < @ $* . >		<?> $1 < @ $2 >			strip trailing dots
dnl workspace: <?> localpart<@domain>
R<?> $- < @ $* >		$: <?> $(dequote $1 $) < @ $2 >	dequote local part

# if no $=O character, no host in the user portion, we are done
R<?> $* $=O $* < @ $* >		$: <NO> $1 $2 $3 < @ $4>
dnl no $=O in localpart: return
R<?> $*				$@ $1

dnl workspace: <?> localpart<@domain>, where localpart contains $=O
dnl mark everything which has an "authorized" domain with <RELAY>
ifdef(`_RELAY_ENTIRE_DOMAIN_', `dnl
# if we relay, check username portion for user%host so host can be checked also
R<NO> $* < @ $* $=m >		$: <RELAY> $1 < @ $2 $3 >', `dnl')

ifdef(`_RELAY_MX_SERVED_', `dnl
dnl do "we" ($=w) act as backup MX server for the destination domain?
R<NO> $* < @ $+ >		$: <MX> < : $(mxserved $2 $) : > < $1 < @$2 > >
R<MX> < : $* <TEMP> : > $*	$#error $@ 4.7.1 $: "450 Can not check MX records for recipient host " $1
dnl yes: mark it as <RELAY>
R<MX> < $* : $=w. : $* > < $+ >	$: <RELAY> $4
dnl no: put old <NO> mark back
R<MX> < : $* : > < $+ >		$: <NO> $2', `dnl')

dnl workspace: <(NO|RELAY)> localpart<@domain>, where localpart contains $=O
dnl if mark is <NO> then change it to <RELAY> if domain is "authorized"
ifdef(`_RELAY_HOSTS_ONLY_',
`R<NO> $* < @ $=R >		$: <RELAY> $1 < @ $2 >
ifdef(`_ACCESS_TABLE_', `dnl
R<NO> $* < @ $+ >		$: <$(access To:$2 $: NO $)> $1 < @ $2 >
R<NO> $* < @ $+ >		$: <$(access $2 $: NO $)> $1 < @ $2 >',`dnl')',
`R<NO> $* < @ $* $=R >		$: <RELAY> $1 < @ $2 $3 >
ifdef(`_ACCESS_TABLE_', `dnl
R<NO> $* < @ $+ >		$: $>LookUpDomain <$2> <NO> <$1 < @ $2 >> <+To>
R<$+> <$+>			$: <$1> $2',`dnl')')


R<RELAY> $* < @ $* >		$@ $>ParseRecipient $1
R<$-> $*			$@ $2


######################################################################
###  check_relay -- check hostname/address on SMTP startup
######################################################################

SLocal_check_relay
Scheck`'_U_`'relay
R$*			$: $1 $| $>"Local_check_relay" $1
R$* $| $* $| $#$*	$#$3
R$* $| $* $| $*		$@ $>"Basic_check_relay" $1 $| $2

SBasic_check_relay
# check for deferred delivery mode
R$*			$: < ${deliveryMode} > $1
R< d > $*		$@ deferred
R< $* > $*		$: $2

ifdef(`_ACCESS_TABLE_', `dnl
R$+ $| $+		$: $>LookUpDomain < $1 > <?> < $2 > <+Connect>
R<?> <$+>		$: $>LookUpAddress < $1 > <?> < $1 > <+Connect>	no: another lookup
R<?> < $+ >		$: $1					found nothing
R<$={Accept}> < $* >	$@ $1
R<REJECT> $*		$#error ifdef(`confREJECT_MSG', `$: "confREJECT_MSG"', `$@ 5.7.1 $: "550 Access denied"')
R<DISCARD> $*		$#discard $: discard
dnl error tag
R<ERROR:$-.$-.$-:$+> $*		$#error $@ $1.$2.$3 $: $4
R<ERROR:$+> $*		$#error $: $1
dnl generic error from access map
R<$+> $*		$#error $: $1', `dnl')

ifdef(`_RBL_',`dnl
# DNS based IP address spam list
R$*			$: $&{client_addr}
R::ffff:$-.$-.$-.$-	$: <?> $(host $4.$3.$2.$1._RBL_. $: OK $)
R$-.$-.$-.$-		$: <?> $(host $4.$3.$2.$1._RBL_. $: OK $)
R<?>OK			$: OKSOFAR
R<?>$+			$#error $@ 5.7.1 $: "550 Mail from " $&{client_addr} " refused by blackhole site _RBL_"',
`dnl')
undivert(8)

######################################################################
###  check_mail -- check SMTP ``MAIL FROM:'' command argument
######################################################################

SLocal_check_mail
Scheck`'_U_`'mail
R$*			$: $1 $| $>"Local_check_mail" $1
R$* $| $#$*		$#$2
R$* $| $*		$@ $>"Basic_check_mail" $1

SBasic_check_mail
# check for deferred delivery mode
R$*			$: < ${deliveryMode} > $1
R< d > $*		$@ deferred
R< $* > $*		$: $2

dnl workspace: address as given by MAIL FROM:
R<>			$@ <OK>			we MUST accept <> (RFC 1123)
ifdef(`_ACCEPT_UNQUALIFIED_SENDERS_',`dnl',`dnl
dnl do some additional checks
dnl no user@host
dnl no user@localhost (if nonlocal sender)
dnl this is a pretty simple canonification, it will not catch every case
dnl just make sure the address has <> around it (which is required by
dnl the RFC anyway, maybe we should complain if they are missing...)
dnl dirty trick: if it is user@host, just add a dot: user@host. this will
dnl not be modified by host lookups.
R$+			$: <?> $1
R<?><$+>		$: <@> <$1>
R<?>$+			$: <@> <$1>
dnl workspace: <@> <address>
dnl prepend daemon_flags
R$*			$: $&{daemon_flags} $| $1
dnl workspace: ${daemon_flags} $| <@> <address>
dnl do not allow these at all or only from local systems?
R$* f $* $| <@> < $* @ $- >	$: < ? $&{client_name} > < $3 @ $4 >
dnl accept unqualified sender: change mark to avoid test
R$* u $* $| <@> < $* >	$: <?> < $3 >
dnl workspace: ${daemon_flags} $| <@> <address>
dnl        or:                    <? ${client_name} > <address>
dnl        or:                    <?> <address>
dnl remove daemon_flags
R$* $| $*		$: $2
# handle case of @localhost on address
R<@> < $* @ localhost >	$: < ? $&{client_name} > < $1 @ localhost >
R<@> < $* @ [127.0.0.1] >
			$: < ? $&{client_name} > < $1 @ [127.0.0.1] >
R<@> < $* @ localhost.$m >
			$: < ? $&{client_name} > < $1 @ localhost.$m >
ifdef(`_NO_UUCP_', `dnl',
`R<@> < $* @ localhost.UUCP >
			$: < ? $&{client_name} > < $1 @ localhost.UUCP >')
dnl workspace: < ? $&{client_name} > <user@localhost|host>
dnl	or:    <@> <address>
dnl	or:    <?> <address>	(thanks to u in ${daemon_flags})
R<@> $*			$: $1			no localhost as domain
dnl workspace: < ? $&{client_name} > <user@localhost|host>
dnl	or:    <address>
dnl	or:    <?> <address>	(thanks to u in ${daemon_flags})
R<? $=w> $*		$: $2			local client: ok
R<? $+> <$+>		$#error $@ 5.5.4 $: "553 Real domain name required"
dnl remove <?> (happens only if ${client_name} == "" or u in ${daemon_flags})
R<?> $*			$: $1')
dnl workspace: address (or <address>)
R$*			$: <?> $>CanonAddr $1		canonify sender address and mark it
dnl workspace: <?> CanonicalAddress (i.e. address in canonical form localpart<@host>)
dnl there is nothing behind the <@host> so no trailing $* needed
R<?> $* < @ $+ . >	<?> $1 < @ $2 >			strip trailing dots
# handle non-DNS hostnames (*.bitnet, *.decnet, *.uucp, etc)
R<?> $* < @ $* $=P >	$: <OK> $1 < @ $2 $3 >
dnl workspace <mark> CanonicalAddress	where mark is ? or OK
ifdef(`_ACCEPT_UNRESOLVABLE_DOMAINS_',
`R<?> $* < @ $+ >	$: <OK> $1 < @ $2 >		... unresolvable OK',
`R<?> $* < @ $+ >	$: <? $(resolve $2 $: $2 <PERM> $) > $1 < @ $2 >
R<? $* <$->> $* < @ $+ >
			$: <$2> $3 < @ $4 >')
dnl workspace <mark> CanonicalAddress	where mark is ?, OK, PERM, TEMP
dnl mark is ? iff the address is user (wo @domain)

ifdef(`_ACCESS_TABLE_', `dnl
# check sender address: user@address, user@, address
dnl should we remove +ext from user?
dnl workspace: <mark> CanonicalAddress where mark is: ?, OK, PERM, TEMP
R<$+> $+ < @ $* >	$: @<$1> <$2 < @ $3 >> $| <F:$2@$3> <U:$2@> <H:$3>
R<$+> $+		$: @<$1> <$2> $| <U:$2@>
dnl workspace: @<mark> <CanonicalAddress> $| <@type:address> ....
dnl $| is used as delimiter, otherwise false matches may occur: <user<@domain>>
dnl will only return user<@domain when "reversing" the args
R@ <$+> <$*> $| <$+>	$: <@> <$1> <$2> $| $>SearchList <+From> $| <$3> <>
dnl workspace: <@><mark> <CanonicalAddress> $| <result>
R<@> <$+> <$*> $| <$*>	$: <$3> <$1> <$2>		reverse result
dnl workspace: <result> <mark> <CanonicalAddress>
# retransform for further use
dnl required form:
dnl <ResultOfLookup|mark> CanonicalAddress
R<?> <$+> <$*>		$: <$1> $2	no match
R<$+> <$+> <$*>		$: <$1> $3	relevant result, keep it', `dnl')
dnl workspace <ResultOfLookup|mark> CanonicalAddress
dnl mark is ? iff the address is user (wo @domain)

ifdef(`_ACCEPT_UNQUALIFIED_SENDERS_',`dnl',`dnl
# handle case of no @domain on address
dnl prepend daemon_flags
R<?> $*			$: $&{daemon_flags} $| <?> $1
dnl accept unqualified sender: change mark to avoid test
R$* u $* $| <?> $*	$: <OK> $3
dnl remove daemon_flags
R$* $| $*		$: $2
R<?> $*			$: < ? $&{client_name} > $1
R<?> $*			$@ <OK>				...local unqualed ok
R<? $+> $*		$#error $@ 5.5.4 $: "553 Domain name required"
							...remote is not')
# check results
R<?> $*			$: @ $1		mark address: nothing known about it
R<OK> $*		$@ <OK>
R<TEMP> $*		$#error $@ 4.1.8 $: "451 Domain of sender address " $&f " does not resolve"
R<PERM> $*		$#error $@ 5.1.8 $: "501 Domain of sender address " $&f " does not exist"
ifdef(`_ACCESS_TABLE_', `dnl
R<$={Accept}> $*	$# $1
R<DISCARD> $*		$#discard $: discard
R<REJECT> $*		$#error ifdef(`confREJECT_MSG', `$: "confREJECT_MSG"', `$@ 5.7.1 $: "550 Access denied"')
dnl error tag
R<ERROR:$-.$-.$-:$+> $*		$#error $@ $1.$2.$3 $: $4
R<ERROR:$+> $*		$#error $: $1
dnl generic error from access map
R<$+> $*		$#error $: $1		error from access db',
`dnl')

######################################################################
###  check_rcpt -- check SMTP ``RCPT TO:'' command argument
######################################################################

SLocal_check_rcpt
Scheck`'_U_`'rcpt
R$*			$: $1 $| $>"Local_check_rcpt" $1
R$* $| $#$*		$#$2
R$* $| $*		$@ $>"Basic_check_rcpt" $1

SBasic_check_rcpt
# check for deferred delivery mode
R$*			$: < ${deliveryMode} > $1
R< d > $*		$@ deferred
R< $* > $*		$: $2

ifdef(`_REQUIRE_QUAL_RCPT_', `dnl
# require qualified recipient?
R$+			$: <?> $1
R<?><$+>		$: <@> <$1>
R<?>$+			$: <@> <$1>
dnl prepend daemon_flags
R$*			$: $&{daemon_flags} $| $1
dnl workspace: ${daemon_flags} $| <@> <address>
dnl do not allow these at all or only from local systems?
R$* r $* $| <@> < $* @ $- >	$: < ? $&{client_name} > < $3 @ $4 >
R<?> < $* >		$: <$1>
R<? $=w> < $* >		$: <$1>
R<? $+> <$+>		$#error $@ 5.5.4 $: "553 Domain name required"
dnl remove daemon_flags for other cases
R$* $| <@> $*		$: $2', `dnl')

ifdef(`_LOOSE_RELAY_CHECK_',`dnl
R$*			$: $>CanonAddr $1
R$* < @ $* . >		$1 < @ $2 >			strip trailing dots',
`R$*			$: $>ParseRecipient $1		strip relayable hosts')

ifdef(`_BESTMX_IS_LOCAL_',`dnl
ifelse(_BESTMX_IS_LOCAL_, `', `dnl
# unlimited bestmx
R$* < @ $* > $*			$: $1 < @ $2 @@ $(bestmx $2 $) > $3',
`dnl
# limit bestmx to $=B
R$* < @ $* $=B > $*		$: $1 < @ $2 $3 @@ $(bestmx $2 $3 $) > $4')
R$* $=O $* < @ $* @@ $=w . > $*	$@ $>"Basic_check_rcpt" $1 $2 $3
R$* < @ $* @@ $=w . > $*	$: $1 < @ $3 > $4
R$* < @ $* @@ $* > $*		$: $1 < @ $2 > $4')

ifdef(`_BLACKLIST_RCPT_',`dnl
ifdef(`_ACCESS_TABLE_', `dnl
# blacklist local users or any host from receiving mail
R$*			$: <?> $1
dnl user is now tagged with @ to be consistent with check_mail
dnl and to distinguish users from hosts (com would be host, com@ would be user)
R<?> $+ < @ $=w >	$: <> <$1 < @ $2 >> $| <F:$1@$2> <U:$1@>
R<?> $+ < @ $* >	$: <> <$1 < @ $2 >> $| <F:$1@$2> <H:$2>
R<?> $+			$: <> <$1> $| <U:$1@>
dnl $| is used as delimiter, otherwise false matches may occur: <user<@domain>>
dnl will only return user<@domain when "reversing" the args
R<> <$*> $| <$+>	$: <@> <$1> $| $>SearchList <+To> $| <$2> <>
R<@> <$*> $| <$*>	$: <$2> <$1>		reverse result
R<?> <$*>		$: @ $1		mark address as no match
R<$={Accept}> <$*>	$: @ $2		mark address as no match
ifdef(`_DELAY_CHECKS_',`dnl
dnl we have to filter these because otherwise they would be interpreted
dnl as generic error message...
dnl error messages should be "tagged" by prefixing them with error: !
dnl that would make a lot of things easier.
dnl maybe we should stop checks already here (if SPAM_xyx)?
R<$={SpamTag}> <$*>	$: @ $2		mark address as no match')
R<REJECT> $*		$#error $@ 5.2.1 $: "550 Mailbox disabled for this recipient"
R<DISCARD> $*		$#discard $: discard
dnl error tag
R<ERROR:$-.$-.$-:$+> $*		$#error $@ $1.$2.$3 $: $4
R<ERROR:$+> $*		$#error $: $1
dnl generic error from access map
R<$+> $*		$#error $: $1		error from access db
R@ $*			$1		remove mark', `dnl')', `dnl')

ifdef(`_PROMISCUOUS_RELAY_', `divert(-1)')
# authenticated by a trusted mechanism?
R$*			$: $1 $| $&{auth_type}
dnl empty ${auth_type}?
R$* $|			$: $1
dnl mechanism ${auth_type} accepted?
dnl use $# to override further tests (delay_checks): see check_rcpt below
R$* $| $={TrustAuthMech}	$# RELAYAUTH
dnl undo addition of ${auth_type}
R$* $| $*		$: $1
ifelse(defn(`_NO_UUCP_'), `r',
`R$* ! $* < @ $* >	$: <REMOTE> $2 < @ BANG_PATH >', `dnl')
# anything terminating locally is ok
ifdef(`_RELAY_ENTIRE_DOMAIN_', `dnl
R$+ < @ $* $=m >	$@ RELAYTO', `dnl')
R$+ < @ $=w >		$@ RELAYTO
ifdef(`_RELAY_HOSTS_ONLY_',
`R$+ < @ $=R >		$@ RELAYTO
ifdef(`_ACCESS_TABLE_', `dnl
R$+ < @ $+ >		$: <$(access To:$2 $: ? $)> <$1 < @ $2 >>
R$+ < @ $+ >		$: <$(access $2 $: ? $)> <$1 < @ $2 >>',`dnl')',
`R$+ < @ $* $=R >	$@ RELAYTO
ifdef(`_ACCESS_TABLE_', `dnl
R$+ < @ $+ >		$: $>LookUpDomain <$2> <?> <$1 < @ $2 >> <+To>',`dnl')')
ifdef(`_ACCESS_TABLE_', `dnl
R<RELAY> $*		$@ RELAYTO
R<$*> <$*>		$: $2',`dnl')


ifdef(`_RELAY_MX_SERVED_', `dnl
# allow relaying for hosts which we MX serve
R$+ < @ $+ >		$: < : $(mxserved $2 $) : > $1 < @ $2 >
dnl this must not necessarily happen if the client is checked first...
R< : $* <TEMP> : > $*	$#error $@ 4.7.1 $: "450 Can not check MX records for recipient host " $1
R<$* : $=w . : $*> $*	$@ RELAYTO
R< : $* : > $*		$: $2',
`dnl')

# check for local user (i.e. unqualified address)
R$*			$: <?> $1
R<?> $* < @ $+ >	$: <REMOTE> $1 < @ $2 >
# local user is ok
dnl is it really? the standard requires user@domain, not just user
dnl but we should accept it anyway (maybe making it an option:
dnl RequireFQDN ?)
dnl postmaster must be accepted without domain (DRUMS)
ifdef(`_REQUIRE_QUAL_RCPT_', `dnl
R<?> postmaster		$@ TOPOSTMASTER
# require qualified recipient?
dnl prepend daemon_flags
R<?> $+			$: $&{daemon_flags} $| <?> $1
dnl workspace: ${daemon_flags} $| <?> localpart
dnl do not allow these at all or only from local systems?
dnl r flag? add client_name
R$* r $* $| <?> $+	$: < ? $&{client_name} > <?> $3
dnl no r flag: relay to local user (only local part)
# no qualified recipient required
R$* $| <?> $+		$@ RELAYTOLOCAL
dnl client_name is empty
R<?> <?> $+		$@ RELAYTOLOCAL
dnl client_name is local
R<? $=w> <?> $+		$@ RELAYTOLOCAL
dnl client_name is not local
R<? $+> $+		$#error $@ 5.5.4 $: "553 Domain name required"', `dnl
dnl no qualified recipient required
R<?> $+			$@ RELAYTOLOCAL')
dnl it is a remote user: remove mark and then check client
R<$+> $*		$: $2
dnl currently the recipient address is not used below

# anything originating locally is ok
# check IP address
R$*			$: $&{client_addr}
R$@			$@ RELAYFROM		originated locally
R0			$@ RELAYFROM		originated locally
R$=R $*			$@ RELAYFROM		relayable IP address
ifdef(`_ACCESS_TABLE_', `dnl
R$*			$: $>LookUpAddress <$1> <?> <$1> <+Connect>
R<RELAY> $* 		$@ RELAYFROM		relayable IP address
R<$*> <$*>		$: $2', `dnl')
R$*			$: [ $1 ]		put brackets around it...
R$=w			$@ RELAYFROM		... and see if it is local

ifdef(`_RELAY_DB_FROM_', `define(`_RELAY_MAIL_FROM_', `1')')dnl
ifdef(`_RELAY_LOCAL_FROM_', `define(`_RELAY_MAIL_FROM_', `1')')dnl
ifdef(`_RELAY_MAIL_FROM_', `dnl
dnl input: {client_addr} or something "broken"
dnl just throw the input away; we do not need it.
# check whether FROM is allowed to use system as relay
R$*			$: <?> $>CanonAddr $&f
ifdef(`_RELAY_LOCAL_FROM_', `dnl
# check whether local FROM is ok
R<?> $+ < @ $=w . >	$@ RELAYFROMMAIL	FROM local', `dnl')
ifdef(`_RELAY_DB_FROM_', `dnl
R<?> $+ < @ $+ . >	<?> $1 < @ $2 >		remove trailing dot
R<?> $+ < @ $+ >	$: $1 < @ $2 > $| $>SearchList <! From> $| <F:$1@$2> ifdef(`_RELAY_DB_FROM_DOMAIN_', `<H:$2>') <>
R$* <RELAY>		$@ RELAYFROMMAIL	RELAY FROM sender ok', `dnl
ifdef(`_RELAY_DB_FROM_DOMAIN_', `errprint(`*** ERROR: _RELAY_DB_FROM_DOMAIN_ requires _RELAY_DB_FROM_
')',
`dnl')
dnl')', `dnl')

# check client name: first: did it resolve?
dnl input: ignored
R$*			$: < $&{client_resolve} >
R<TEMP>			$#error $@ 4.7.1 $: "450 Relaying temporarily denied. Cannot resolve PTR record for " $&{client_addr}
R<FORGED>		$#error $@ 5.7.1 $: "550 Relaying denied. IP name possibly forged " $&{client_name}
R<FAIL>			$#error $@ 5.7.1 $: "550 Relaying denied. IP name lookup failed " $&{client_name}
dnl ${client_resolve} should be OK, so go ahead
R$*			$: <?> $&{client_name}
# pass to name server to make hostname canonical
R<?> $* $~P 		$:<?>  $[ $1 $2 $]
R$* .			$1			strip trailing dots
dnl should not be necessary since it has been done for client_addr already
R<?>			$@ RELAYFROM
ifdef(`_RELAY_ENTIRE_DOMAIN_', `dnl
R<?> $* $=m		$@ RELAYFROM', `dnl')
R<?> $=w		$@ RELAYFROM
ifdef(`_RELAY_HOSTS_ONLY_',
`R<?> $=R		$@ RELAYFROM
ifdef(`_ACCESS_TABLE_', `dnl
R<?> $*			$: <$(access Connect:$1 $: ? $)> <$1>
R<?> <$*>		$: <$(access $1 $: ? $)> <$1>',`dnl')',
`R<?> $* $=R			$@ RELAYFROM
ifdef(`_ACCESS_TABLE_', `dnl
R<?> $*			$: $>LookUpDomain <$1> <?> <$1> <+Connect>',`dnl')')
ifdef(`_ACCESS_TABLE_', `dnl
R<RELAY> $*		$@ RELAYFROM
R<$*> <$*>		$: $2',`dnl')

# anything else is bogus
R$*			$#error $@ 5.7.1 $: confRELAY_MSG
divert(0)
ifdef(`_DELAY_CHECKS_',`dnl
# turn a canonical address in the form user<@domain>
# qualify unqual. addresses with $j
dnl it might have been only user (without <@domain>)
SFullAddr
R$* <@ $+ . >		$1 <@ $2 >
R$* <@ $* >		$@ $1 <@ $2 >
R$+			$@ $1 <@ $j >

# call all necessary rulesets
Scheck_rcpt
dnl this test should be in the Basic_check_rcpt ruleset
dnl which is the correct DSN code?
# R$@			$#error $@ 5.1.3 $: "553 Recipient address required"
R$+			$: $1 $| $>checkrcpt $1
dnl now we can simply stop checks by returning "$# xyz" instead of just "ok"
R$+ $| $#$*		$#$2
R$+ $| $*		$: <?> $>FullAddr $>CanonAddr $1
ifdef(`_SPAM_FH_',
`dnl lookup user@ and user@address
ifdef(`_ACCESS_TABLE_', `',
`errprint(`*** ERROR: FEATURE(`delay_checks', `argument') requires FEATURE(`access_db')
')')dnl
dnl one of the next two rules is supposed to match
dnl this code has been copied from BLACKLIST... etc
dnl and simplified by omitting some < >.
R<?> $+ < @ $=w >	$: <> $1 < @ $2 > $| <F: $1@$2 > <U: $1@>
R<?> $+ < @ $* >	$: <> $1 < @ $2 > $| <F: $1@$2 >
dnl R<?>		$@ something_is_very_wrong_here
# lookup the addresses only with To tag
R<> $* $| <$+>		$: <@> $1 $| $>SearchList <!To> $| <$2> <>
R<@> $* $| $*		$: $2 $1		reverse result
dnl', `dnl')
ifdef(`_SPAM_FRIEND_',
`# is the recipient a spam friend?
ifdef(`_SPAM_HATER_',
	`errprint(`*** ERROR: define either SpamHater or SpamFriend
')', `dnl')
R<SPAMFRIEND> $+	$@ SPAMFRIEND
R<$*> $+		$: $2',
`dnl')
ifdef(`_SPAM_HATER_',
`# is the recipient no spam hater?
R<SPAMHATER> $+		$: $1			spam hater: continue checks
R<$*> $+		$@ NOSPAMHATER		everyone else: stop
dnl',`dnl')
dnl run further checks: check_mail
dnl should we "clean up" $&f?
R$*			$: $1 $| $>checkmail <$&f>
R$* $| $#$*		$#$2
dnl run further checks: check_relay
R$*			$: $1 $| $>checkrelay $&{client_name} $| $&{client_addr}
R$* $| $#$*		$#$2
R$* $| $*		$: $1
', `dnl')
ifdef(`_ACCESS_TABLE_', `dnl
######################################################################
###  SearchList: search a list of items in the access map
###	Parameters:
###		<exact tag> $| <mark:address> <mark:address> ... <>
dnl	maybe we should have a @ (again) in front of the mark to
dnl	avoid errorneous matches (with error messages?)
dnl	if we can make sure that tag is always a single token
dnl	then we can omit the delimiter $|, otherwise we need it
dnl	to avoid errorneous matchs (first rule: H: if there
dnl	is that mark somewhere in the list, it will be taken).
dnl	moreover, we can do some tricks to enforce lookup with
dnl	the tag only, e.g.:
###	where "exact" is either "+" or "!":
###	<+ TAG>	lookup with and w/o tag
###	<! TAG>	lookup with tag
dnl	Warning: + and ! should be in OperatorChars (otherwise there must be
dnl		a blank between them and the tag.
###	possible values for "mark" are:
###		H: recursive host lookup (LookUpDomain)
dnl		A: recursive address lookup (LookUpAddress) [not yet required]
###		E: exact lookup, no modifications
###		F: full lookup, try user+ext@domain and user@domain
###		U: user lookup, try user+ext and user (input must have trailing @)
###	return: <RHS of lookup> or <?> (not found)
######################################################################

SSearchList
# if it is H: do lookup?
R<$+> $| <H:$+> <$*>		$: <$1> $| <@> $>LookUpDomain <$2> <?> <$3> <$1>
R<$+> $| <@> <$+> <$*>		$: <$1> $| <$2> <$3>
dnl A: NOT YET REQUIRED
dnl R<$+> $| <A:$+> <$*>	$: <$1> $| <@> $>LookUpAddress <$2> <?> <$3> <$1>
dnl R<$+> $| <@> <$+> <$*>	$: <$1> $| <$2> <$3>
dnl lookup of the item with tag
dnl this applies to F: U: E:
R<$- $-> $| <$-:$+> <$*>	$: <$1 $2> $| <$(access $2`'_TAG_DELIM_`'$4 $: $3:$4 $)> <$5>
dnl no match, try without tag
R<+ $-> $| <$-:$+> <$*>		$: <+ $1> $| <$(access $3 $: $2:$3 $)> <$4>
dnl do we really have to distinguish these cases?
dnl probably yes, there might be a + in the domain part (is that allowed?)
dnl user+detail lookups: should it be:
dnl user+detail, user+*, user; just like aliases?
R<$- $-> $| <F:$* + $*@$+> <$*>	$: <$1 $2> $| <$(access $2`'_TAG_DELIM_`'$3@$5 $: F:$3 + $4@$5$)> <$6>
R<+ $-> $| <F:$* + $*@$+> <$*>	$: <+ $1> $| <$(access $2@$4 $: F:$2 + $3@$4$)> <$5>
dnl user lookups are always with trailing @
dnl do not remove the @ from the lookup:
dnl it is part of the +detail@ which is omitted for the lookup
R<$- $-> $| <U:$* + $*> <$*>	$: <$1 $2> $| <$(access $2`'_TAG_DELIM_`'$3@ $: U:$3 + $4$)> <$5>
R<+ $-> $| <U:$* + $*> <$*>	$: <+ $1> $| <$(access $2@ $: U:$2 + $3$)> <$4>
dnl special case for ERROR because this matches the input mark:address
R<$+> $| <ERROR:$+> <>		$@ <ERROR:$2>
dnl no match, try rest of list
R<$+> $| <$-:$+> <$+>		$@ $>SearchList <$1> $| <$4>
dnl no match, list empty: return failure
R<$+> $| <$-:$+> <>		$@ <?>
dnl got result, return it
R<$+> $| <$+> <$*>		$@ <$2>
dnl return result from recursive invocation
R<$+> $| <$+>			$@ <$2>', `dnl')

# is user trusted to authenticate as someone else?
dnl AUTH= parameter from MAIL command
Strust_auth
R$*			$: $&{auth_type} $| $1
# required by RFC 2554 section 4.
R$@ $| $*		$#error $@ 5.7.1 $: "550 not authenticated"
dnl seems to be useful...
R$* $| $&{auth_authen}		$@ identical
R$* $| <$&{auth_authen}>	$@ identical
dnl call user supplied code
R$* $| $*		$: $1 $| $>"Local_trust_auth" $1
R$* $| $#$*		$#$2
dnl default: error
R$*			$#error $@ 5.7.1 $: "550 " $&{auth_authen} " not allowed to act as " $&{auth_author}

dnl empty ruleset definition so it can be called
SLocal_trust_auth

undivert(9)dnl LOCAL_RULESETS
ifdef(`_FFR_MILTER', `
#
######################################################################
######################################################################
#####
`#####			MAIL FILTER DEFINITIONS'
#####
######################################################################
######################################################################
_MAIL_FILTERS_')
#
######################################################################
######################################################################
#####
`#####			MAILER DEFINITIONS'
#####
######################################################################
######################################################################
undivert(7)dnl MAILER_DEFINITIONS