173 lines
6.3 KiB
Plaintext
173 lines
6.3 KiB
Plaintext
#++
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# NAME
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# transport 5
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# SUMMARY
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# format of Postfix transport table
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# SYNOPSIS
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# \fBpostmap /etc/postfix/transport\fR
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# DESCRIPTION
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# The optional \fBtransport\fR table specifies a mapping from domain
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# hierarchies to message delivery transports and/or relay hosts. The
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# mapping is used by the \fBtrivial-rewrite\fR(8) daemon.
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#
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# Normally, the \fBtransport\fR table is specified as a text file
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# that serves as input to the \fBpostmap\fR(1) command.
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# The result, an indexed file in \fBdbm\fR or \fBdb\fR format, is used
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# for fast searching by the mail system. Execute the command
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# \fBpostmap /etc/postfix/transport\fR in order to rebuild the indexed
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# file after changing the transport table.
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#
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# When the table is provided via other means such as NIS, LDAP
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# or SQL, the same lookups are done as for ordinary indexed files.
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#
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# Alternatively, the table can be provided as a regular-expression
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# map where patterns are given as regular expressions. In that case,
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# the lookups are done in a slightly different way as described below.
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# TABLE FORMAT
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# .ad
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# .fi
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# The format of the transport table is as follows:
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# .IP "\fIpattern result\fR"
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# When \fIpattern\fR matches the domain, use the corresponding
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# \fIresult\fR.
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# .IP "blank lines and comments"
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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 "multi-line text"
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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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# With lookups from indexed files such as DB or DBM, or from networked
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# tables such as NIS, LDAP or SQL, patterns are tried in the order as
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# listed below:
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# .IP "\fIdomain transport\fR:\fInexthop\fR"
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# Mail for \fIdomain\fR is delivered through \fItransport\fR to
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# \fInexthop\fR.
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# .IP "\fI.domain transport\fR:\fInexthop\fR"
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# Mail for any subdomain of \fIdomain\fR is delivered through
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# \fItransport\fR to \fInexthop\fR. This applies only when the
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# string \fBtransport_maps\fR is not listed in the
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# \fBparent_domain_matches_subdomains\fR configuration setting.
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# Otherwise, a domain name matches itself and its subdomains.
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# .PP
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# Note: transport map entries take precedence over domains
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# specified in the \fBmydestination\fR parameter. If you use
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# the optional transport map, it may be safer to specify explicit
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# entries for all domains specified in \fBmydestination\fR,
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# for example:
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#
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# .ti +5
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# \fBhostname.my.domain local:\fR
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# .ti +5
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# \fBlocalhost.my.domain local:\fR
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#
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# The interpretation of the \fInexthop\fR field is transport
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# dependent. In the case of SMTP, specify \fIhost\fR:\fIservice\fR for a
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# non-default server port, and use [\fIhost\fR] or [\fIhost\fR]:\fIport\fR
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# in order to disable MX (mail exchanger) DNS lookups. The [] form
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# can also be used with IP addresses instead of hostnames.
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# EXAMPLES
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# .ad
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# .fi
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# In order to send mail for \fBfoo.org\fR and its subdomains
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# via the \fBuucp\fR transport to the UUCP host named \fBfoo\fR:
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#
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# .ti +5
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# \fBfoo.org uucp:foo\fR
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# .ti +5
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# \fB\&.foo.org uucp:foo\fR
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#
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# When no \fInexthop\fR host name is specified, the destination domain
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# name is used instead. For example, the following directs mail for
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# \fIuser\fR@\fBfoo.org\fR via the \fBslow\fR transport to a mail
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# exchanger for \fBfoo.org\fR. The \fBslow\fR transport could be
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# something that runs at most one delivery process at a time:
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#
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# .ti +5
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# \fBfoo.org slow:\fR
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#
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# When no \fItransport\fR is specified, the default transport is
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# used, as specified via the \fBdefault_transport\fR configuration
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# parameter. The following sends all mail for \fBfoo.org\fR and its
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# subdomains to host \fBgateway.foo.org\fR:
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#
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# .ti +5
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# \fBfoo.org :[gateway.foo.org]\fR
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# .ti +5
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# \fB\&.foo.org :[gateway.foo.org]\fR
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#
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# In the above example, the [] are used to suppress MX lookups.
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# The result would likely point to your local machine.
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#
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# In the case of delivery via SMTP, one may specify
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# \fIhostname\fR:\fIservice\fR instead of just a host:
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#
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# .ti +5
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# \fBfoo.org smtp:bar.org:2025\fR
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#
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# This directs mail for \fIuser\fR@\fBfoo.org\fR to host \fBbar.org\fR
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# port \fB2025\fR. Instead of a numerical port a symbolic name may be
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# used. Specify [] around the hostname in order to disable MX lookups.
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#
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# The error mailer can be used to bounce mail:
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#
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# .ti +5
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# \fB\&.foo.org error:mail for *.foo.org is not deliverable\fR
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#
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# This causes all mail for \fIuser\fR@\fIanything\fB.foo.org\fR
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# to be bounced.
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# REGULAR EXPRESSION TABLES
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# .ad
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# .fi
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# This section describes how the table lookups change when the table
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# is given in the form of regular expressions. For a description of
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# regular expression lookup table syntax, see \fBregexp_table\fR(5)
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# or \fBpcre_table\fR(5).
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#
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# Each pattern is a regular expression that is applied to the entire
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# domain being looked up. Thus, \fIsome.domain.hierarchy\fR is not
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# broken up into parent domains.
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#
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# Patterns are applied in the order as specified in the table, until a
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# pattern is found that matches the search string.
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#
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# Results are the same as with indexed file lookups, with
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# the additional feature that parenthesized substrings from the
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# pattern can be interpolated as \fB$1\fR, \fB$2\fR and so on.
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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 \fBparent_domain_matches_subdomains\fR
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# List of Postfix features that use \fIdomain.name\fR patterns
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# to match \fIsub.domain.name\fR (as opposed to
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# requiring \fI.domain.name\fR patterns).
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# .IP \fBtransport_maps\fR
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# List of transport lookup tables.
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# .PP
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# Other parameters of interest:
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# .IP \fBdefault_transport\fR
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# The transport to use when no transport is explicitly specified.
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# .IP \fBrelayhost\fR
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# The default host to send to when no transport table entry matches.
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# SEE ALSO
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# postmap(1) create mapping table
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# trivial-rewrite(8) rewrite and resolve addresses
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# pcre_table(5) format of PCRE tables
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# regexp_table(5) format of POSIX regular expression tables
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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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# By default, this file is not used. See sample-transport.cf
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