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ADDRESS_REWRITING_README.html	51.57 KB	-rw-r--r--	2020-02-16 20:59
ADDRESS_VERIFICATION_README.html	29.08 KB	-rw-r--r--	2020-02-16 20:59
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ETRN_README.html	13.83 KB	-rw-r--r--	2020-02-16 20:59
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Rename

<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">
<html> <head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<title> Postfix manual - canonical(5) </title>
</head> <body> <pre>
CANONICAL(5) CANONICAL(5)

NAME
 canonical - Postfix canonical table format

SYNOPSIS
 postmap /etc/postfix/canonical

postmap -q "string" /etc/postfix/canonical

postmap -q - /etc/postfix/canonical &lt;inputfile

DESCRIPTION
 The optional <a href="canonical.5.html">canonical(5)</a> table specifies an address mapping for local
 and non-local addresses. The mapping is used by the <a href="cleanup.8.html">cleanup(8)</a> daemon,
 before mail is stored into the queue. The address mapping is recur-
 sive.

Normally, the <a href="canonical.5.html">canonical(5)</a> table is specified as a text file that
 serves as input to the <a href="postmap.1.html">postmap(1)</a> command. The result, an indexed file
 in dbm or db format, is used for fast searching by the mail system.
 Execute the command "postmap /etc/postfix/canonical" to rebuild an
 indexed file after changing the corresponding text file.

When the table is provided via other means such as NIS,  LDAP  or  SQL,
       the same lookups are done as for ordinary indexed files.

Alternatively,  the  table  can be provided as a regular-expression map
       where patterns are given as regular  expressions,  or  lookups  can  be
       directed to TCP-based server. In those cases, the lookups are done in a
       slightly different way as described  below  under  "REGULAR  EXPRESSION
       TABLES" or "TCP-BASED TABLES".

By default the <a href="canonical.5.html">canonical(5)</a> mapping affects both message header
 addresses (i.e. addresses that appear inside messages) and message
 envelope addresses (for example, the addresses that are used in SMTP
 protocol commands). This is controlled with the <a href="postconf.5.html#canonical_classes">canonical_classes</a>
 parameter.

NOTE: Postfix versions 2.2 and later rewrite message headers from
 remote SMTP clients only if the client matches the <a href="postconf.5.html#local_header_rewrite_clients">local_header_re</a>-
 <a href="postconf.5.html#local_header_rewrite_clients">write_clients</a> parameter, or if the <a href="postconf.5.html#remote_header_rewrite_domain">remote_header_rewrite_domain</a> config-
 uration parameter specifies a non-empty value. To get the behavior
 before Postfix 2.2, specify "<a href="postconf.5.html#local_header_rewrite_clients">local_header_rewrite_clients</a> =
 <a href="DATABASE_README.html#types">static</a>:all".

Typically, one would use the <a href="canonical.5.html">canonical(5)</a> table to replace login names
 by Firstname.Lastname, or to clean up addresses produced by legacy mail
 systems.

The <a href="canonical.5.html">canonical(5)</a> mapping is not to be confused with virtual alias sup-
 port or with local aliasing. To change the destination but not the
 headers, use the <a href="virtual.5.html">virtual(5)</a> or <a href="aliases.5.html">aliases(5)</a> map instead.

CASE FOLDING
 The search string is folded to lowercase before database lookup. As of
 Postfix 2.3, the search string is not case folded with database types
 such as <a href="regexp_table.5.html">regexp</a>: or <a href="pcre_table.5.html">pcre</a>: whose lookup fields can match both upper and
 lower case.

TABLE FORMAT
 The input format for the <a href="postmap.1.html">postmap(1)</a> command is as follows:

pattern address
 When pattern matches a mail address, replace it by the corre-
 sponding address.

blank lines and comments
              Empty lines and whitespace-only lines are ignored, as are  lines
              whose first non-whitespace character is a `#'.

multi-line text
              A  logical  line  starts  with  non-whitespace text. A line that
              starts with whitespace continues a logical line.

TABLE SEARCH ORDER
 With lookups from indexed files such as DB or DBM, or from networked
 tables such as NIS, LDAP or SQL, patterns are tried in the order as
 listed below:

user@domain address
 Replace user@domain by address. This form has the highest prece-
 dence.

This is useful to clean up addresses produced by legacy mail
 systems. It can also be used to produce Firstname.Lastname
 style addresses, but see below for a simpler solution.

user address
 Replace user@site by address when site is equal to $<a href="postconf.5.html#myorigin">myorigin</a>,
 when site is listed in $<a href="postconf.5.html#mydestination">mydestination</a>, or when it is listed in
 $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a> or $<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>.

This form is useful for replacing login names by Firstname.Last-
 name.

@domain address
 Replace other addresses in domain by address. This form has the
 lowest precedence.

Note: @domain is a wild-card. When this form is applied to
 recipient addresses, the Postfix SMTP server accepts mail for
 any recipient in domain, regardless of whether that recipient
 exists. This may turn your mail system into a backscatter
 source: Postfix first accepts mail for non-existent recipients
 and then tries to return that mail as "undeliverable" to the
 often forged sender address.

RESULT ADDRESS REWRITING
 The lookup result is subject to address rewriting:

o When the result has the form @otherdomain, the result becomes
 the same user in otherdomain.

o When "<a href="postconf.5.html#append_at_myorigin">append_at_myorigin</a>=yes", append "@$<a href="postconf.5.html#myorigin">myorigin</a>" to addresses
 without "@domain".

o When "<a href="postconf.5.html#append_dot_mydomain">append_dot_mydomain</a>=yes", append ".$<a href="postconf.5.html#mydomain">mydomain</a>" to addresses
 without ".domain".

ADDRESS EXTENSION
 When a mail address localpart contains the optional recipient delimiter
 (e.g., user+foo@domain), the lookup order becomes: user+foo@domain,
 user@domain, user+foo, user, and @domain.

The <a href="postconf.5.html#propagate_unmatched_extensions">propagate_unmatched_extensions</a> parameter controls whether an
 unmatched address extension (+foo) is propagated to the result of table
 lookup.

REGULAR EXPRESSION TABLES
 This section describes how the table lookups change when the table is
 given in the form of regular expressions. For a description of regular
 expression lookup table syntax, see <a href="regexp_table.5.html">regexp_table(5)</a> or <a href="pcre_table.5.html">pcre_table(5)</a>.

Each pattern is a regular expression that is applied to the entire
 address being looked up. Thus, user@domain mail addresses are not bro-
 ken up into their user and @domain constituent parts, nor is user+foo
 broken up into user and foo.

Patterns  are  applied  in the order as specified in the table, until a
       pattern is found that matches the search string.

Results are the same as with indexed file lookups, with the additional
 feature that parenthesized substrings from the pattern can be interpo-
 lated as $1, $2 and so on.

TCP-BASED TABLES
 This section describes how the table lookups change when lookups are
 directed to a TCP-based server. For a description of the TCP
 client/server lookup protocol, see <a href="tcp_table.5.html">tcp_table(5)</a>. This feature is not
 available up to and including Postfix version 2.4.

Each lookup operation uses the entire address once. Thus, user@domain
 mail addresses are not broken up into their user and @domain con-
 stituent parts, nor is user+foo broken up into user and foo.

Results are the same as with indexed file lookups.

BUGS
 The table format does not understand quoting conventions.

CONFIGURATION PARAMETERS
 The following <a href="postconf.5.html">main.cf</a> parameters are especially relevant. The text
 below provides only a parameter summary. See <a href="postconf.5.html">postconf(5)</a> for more
 details including examples.

<a href="postconf.5.html#canonical_classes">canonical_classes</a>
 What addresses are subject to canonical address mapping.

<a href="postconf.5.html#canonical_maps">canonical_maps</a>
 List of canonical mapping tables.

<a href="postconf.5.html#recipient_canonical_maps">recipient_canonical_maps</a>
 Address mapping lookup table for envelope and header recipient
 addresses.

<a href="postconf.5.html#sender_canonical_maps">sender_canonical_maps</a>
 Address mapping lookup table for envelope and header sender
 addresses.

<a href="postconf.5.html#propagate_unmatched_extensions">propagate_unmatched_extensions</a>
 A list of address rewriting or forwarding mechanisms that propa-
 gate an address extension from the original address to the
 result. Specify zero or more of canonical, virtual, alias, for-
 ward, include, or generic.

Other parameters of interest:

<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>
 The network interface addresses that this system receives mail
 on. You need to stop and start Postfix when this parameter
 changes.

<a href="postconf.5.html#local_header_rewrite_clients">local_header_rewrite_clients</a>
 Rewrite message header addresses in mail from these clients and
 update incomplete addresses with the domain name in $<a href="postconf.5.html#myorigin">myorigin</a> or
 $<a href="postconf.5.html#mydomain">mydomain</a>; either don't rewrite message headers from other
 clients at all, or rewrite message headers and update incomplete
 addresses with the domain specified in the <a href="postconf.5.html#remote_header_rewrite_domain">remote_header_re</a>-
 <a href="postconf.5.html#remote_header_rewrite_domain">write_domain</a> parameter.

<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>
 Other interfaces that this machine receives mail on by way of a
 proxy agent or network address translator.

<a href="postconf.5.html#masquerade_classes">masquerade_classes</a>
 List of address classes subject to masquerading: zero or more of
 envelope_sender, envelope_recipient, header_sender,
 header_recipient.

<a href="postconf.5.html#masquerade_domains">masquerade_domains</a>
 List of domains that hide their subdomain structure.

<a href="postconf.5.html#masquerade_exceptions">masquerade_exceptions</a>
 List of user names that are not subject to address masquerading.

<a href="postconf.5.html#mydestination">mydestination</a>
 List of domains that this mail system considers local.

<a href="postconf.5.html#myorigin">myorigin</a>
 The domain that is appended to locally-posted mail.

<a href="postconf.5.html#owner_request_special">owner_request_special</a>
 Give special treatment to owner-xxx and xxx-request addresses.

<a href="postconf.5.html#remote_header_rewrite_domain">remote_header_rewrite_domain</a>
 Don't rewrite message headers from remote clients at all when
 this parameter is empty; otherwise, rewrite message headers and
 append the specified domain name to incomplete addresses.

SEE ALSO
 <a href="cleanup.8.html">cleanup(8)</a>, canonicalize and enqueue mail
 <a href="postmap.1.html">postmap(1)</a>, Postfix lookup table manager
 <a href="postconf.5.html">postconf(5)</a>, configuration parameters
 <a href="virtual.5.html">virtual(5)</a>, virtual aliasing

README FILES
 <a href="DATABASE_README.html">DATABASE_README</a>, Postfix lookup table overview
 <a href="ADDRESS_REWRITING_README.html">ADDRESS_REWRITING_README</a>, address rewriting guide

LICENSE
 The Secure Mailer license must be distributed with this software.

AUTHOR(S)
 Wietse Venema
 IBM T.J. Watson Research
 P.O. Box 704
 Yorktown Heights, NY 10598, USA

Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA

CANONICAL(5)
</pre> </body> </html>