132 lines
5.2 KiB
Plaintext
132 lines
5.2 KiB
Plaintext
#++
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# NAME
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# aliases 5
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# SUMMARY
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# format of the Postfix alias database
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# SYNOPSIS
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# .fi
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# \fBnewaliases\fR
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# DESCRIPTION
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# The \fBaliases\fR table provides a system-wide mechanism to
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# redirect mail for local recipients. The redirections are
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# processed by the Postfix \fBlocal\fR(8) delivery agent.
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#
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# Normally, the \fBaliases\fR table is specified as a text file
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# that serves as input to the \fBpostalias\fR(1) command. The
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# result, an indexed file in \fBdbm\fR or \fBdb\fR format, is
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# used for fast lookup by the mail system. Execute the command
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# \fBnewaliases\fR in order to rebuild the indexed file after
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# changing the Postfix alias database.
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#
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# The input and output file formats are expected to be compatible
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# with Sendmail version 8, and are expected to be suitable for the
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# use as NIS maps.
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#
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# Users can control delivery of their own mail by setting
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# up \fB.forward\fR files in their home directory.
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# Lines in per-user \fB.forward\fR files have the same syntax
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# as the right-hand side of \fBaliases\fR entries.
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#
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# The format of the alias database input file is as follows:
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# .IP \(bu
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# An alias definition has the form
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# .sp
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# .ti +5
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# \fIname\fR: \fIvalue1\fR, \fIvalue2\fR, \fI...\fR
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# .IP \(bu
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# Empty lines and whitespace-only lines are ignored, as
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# are lines whose first non-whitespace character is a `#'.
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# .IP \(bu
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# A logical line starts with non-whitespace text. A line that
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# starts with whitespace continues a logical line.
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# .PP
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# The \fIname\fR is a local address (no domain part).
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# Use double quotes when the name contains any special characters
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# such as whitespace, `#', `:', or `@'. The \fIname\fR is folded to
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# lowercase, in order to make database lookups case insensitive.
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# .PP
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# In addition, when an alias exists for \fBowner-\fIname\fR, delivery
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# diagnostics are directed to that address, instead of to the originator.
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# This is typically used to direct delivery errors to the owner of
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# a mailing list, who is in a better position to deal with mailing
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# list delivery problems than the originator of the undelivered mail.
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# .PP
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# The \fIvalue\fR contains one or more of the following:
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# .IP \fIaddress\fR
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# Mail is forwarded to \fIaddress\fR, which is compatible
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# with the RFC 822 standard.
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# .IP \fI/file/name\fR
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# Mail is appended to \fI/file/name\fR. See \fBlocal\fR(8)
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# for details of delivery to file.
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# Delivery is not limited to regular files. For example, to dispose
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# of unwanted mail, deflect it to \fB/dev/null\fR.
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# .IP "|\fIcommand\fR"
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# Mail is piped into \fIcommand\fR. Commands that contain special
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# characters, such as whitespace, should be enclosed between double
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# quotes. See \fBlocal\fR(8) for details of delivery to command.
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# .sp
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# When the command fails, a limited amount of command output is
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# mailed back to the sender. The file \fB/usr/include/sysexits.h\fR
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# defines the expected exit status codes. For example, use
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# \fB|"exit 67"\fR to simulate a "user unknown" error, and
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# \fB|"exit 0"\fR to implement an expensive black hole.
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# .IP \fB:include:\fI/file/name\fR
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# Mail is sent to the destinations listed in the named file.
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# Lines in \fB:include:\fR files have the same syntax
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# as the right-hand side of alias entries.
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# .sp
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# A destination can be any destination that is described in this
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# manual page. However, delivery to "|\fIcommand\fR" and
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# \fI/file/name\fR is disallowed by default. To enable, edit the
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# \fBallow_mail_to_commands\fR and \fBallow_mail_to_files\fR
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# configuration parameters.
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# ADDRESS EXTENSION
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# .ad
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# .fi
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# When alias database search fails, and the recipient localpart
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# contains the optional recipient delimiter (e.g., \fIuser+foo\fR),
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# the search is repeated for the unextended address (e.g., \fIuser\fR).
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# CONFIGURATION PARAMETERS
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# .ad
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# .fi
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# The following \fBmain.cf\fR parameters are especially relevant to
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# this topic. See the Postfix \fBmain.cf\fR file for syntax details
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# and for default values. Use the \fBpostfix reload\fR command after
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# a configuration change.
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# .IP \fBalias_maps\fR
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# List of alias databases.
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# .IP \fBallow_mail_to_commands\fR
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# Restrict the usage of mail delivery to external command.
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# .IP \fBallow_mail_to_files\fR
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# Restrict the usage of mail delivery to external file.
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# .IP \fBexpand_owner_alias\fR
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# When delivering to an alias that has an \fBowner-\fR companion alias,
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# set the envelope sender address to the right-hand side of the
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# owner alias, instead using of the left-hand side address.
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# .IP \fBowner_request_special\fR
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# Give special treatment to \fBowner-\fIxxx\fR and \fIxxx\fB-request\fR
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# addresses.
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# .IP \fBrecipient_delimiter\fR
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# Delimiter that separates recipients from address extensions.
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# BUGS
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# Regular expression alias lookup tables are allowed, but
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# substitution of $1 etc. is forbidden because that would
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# open a security loophole.
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# STANDARDS
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# RFC 822 (ARPA Internet Text Messages)
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# SEE ALSO
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# local(8) local delivery agent
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# newaliases(1) alias database management
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# regexp_table(5) POSIX regular expression table format
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# pcre_table(5) Perl Compatible Regular Expression table format
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# LICENSE
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# .ad
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# .fi
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# The Secure Mailer license must be distributed with this software.
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# AUTHOR(S)
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# Wietse Venema
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# IBM T.J. Watson Research
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# P.O. Box 704
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# Yorktown Heights, NY 10598, USA
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#--
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