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<title> Postfix manual - aliases(5) </title>
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aliases - format of the Postfix alias database
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aliases - Postfix local alias database format
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The <b>aliases</b> table provides a system-wide mechanism to
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The <a href="aliases.5.html"><b>aliases</b>(5)</a> 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 <a href="local.8.html"><b>local</b>(8)</a> delivery agent.
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Normally, the <b>aliases</b> table is specified as a text file
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Normally, the <a href="aliases.5.html"><b>aliases</b>(5)</a> table is specified as a text file
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that serves as input to the <a href="postalias.1.html"><b>postalias</b>(1)</a> command. The
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result, an indexed file in <b>dbm</b> or <b>db</b> format, is used for
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fast lookup by the mail system. Execute the command
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Users can control delivery of their own mail by setting up
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<b>.forward</b> files in their home directory. Lines in per-user
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<b>.forward</b> files have the same syntax as the right-hand side
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of <b>aliases</b> entries.
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of <a href="aliases.5.html"><b>aliases</b>(5)</a> entries.
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The format of the alias database input file is as follows:
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<i>user+foo</i>), the search is repeated for the unextended
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address (e.g., <i>user</i>).
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The <b><a href="postconf.5.html#propagate_unmatched_extensions">propagate_unmatched_extensions</a></b> parameter controls
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whether an unmatched address extension (<i>+foo</i>) is propa-
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gated to the result of table lookup.
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The <a href="local.8.html"><b>local</b>(8)</a> delivery agent disallows regular expression
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substitution of $1 etc. in <b><a href="postconf.5.html#alias_maps">alias_maps</a></b>, because that would
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open a security hole.
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The <a href="local.8.html"><b>local</b>(8)</a> delivery agent will silently ignore requests
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to use the <a href="proxymap.8.html"><b>proxymap</b>(8)</a> server within <b><a href="postconf.5.html#alias_maps">alias_maps</a></b>. Instead
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it will open the table directly. Before Postfix version
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2.2, the <a href="local.8.html"><b>local</b>(8)</a> delivery agent will terminate with a
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<b>CONFIGURATION PARAMETERS</b>
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The following <b>main.cf</b> parameters are especially relevant.
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The text below provides only a parameter summary. See
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<a href="postconf.5.html">postconf(5)</a> for more details including examples.
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<a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including examples.
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<b><a href="postconf.5.html#alias_database">alias_database</a></b>
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List of alias databases that are updated by the
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<a href="newaliases.1.html">newaliases(1)</a> command.
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<a href="newaliases.1.html"><b>newaliases</b>(1)</a> command.
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<b><a href="postconf.5.html#alias_maps">alias_maps</a></b>
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List of alias databases queried by the <a href="local.8.html">local(8)</a>
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List of alias databases queried by the <a href="local.8.html"><b>local</b>(8)</a>
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<b><a href="postconf.5.html#allow_mail_to_commands">allow_mail_to_commands</a></b>
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the right-hand side of the owner alias, instead
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using of the left-hand side address.
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<b><a href="postconf.5.html#propagate_unmatched_extensions">propagate_unmatched_extensions</a></b>
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A list of address rewriting or forwarding mecha-
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nisms that propagate an address extension from the
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original address to the result. Specify zero or
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more of <b>canonical</b>, <b>virtual</b>, <b>alias</b>, <b>forward</b>,
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<b>include</b>, or <b>generic</b>.
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<b><a href="postconf.5.html#owner_request_special">owner_request_special</a></b>
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Give special treatment to <b>owner-</b><i>listname</i> and <i>list-</i>
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<i>name</i><b>-request</b> addresses.
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Delimiter that separates recipients from address
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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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<a href="http://www.faqs.org/rfcs/rfc822.html">RFC 822</a> (ARPA Internet Text Messages)
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