Postfix manual - relocated(5)

    RELOCATED(5)                                                      RELOCATED(5)

    NAME
           relocated - Postfix relocated table format

    SYNOPSIS
           postmap /etc/postfix/relocated

    DESCRIPTION
           The  optional  relocated(5) table provides the information that is used
           in "user has moved to new_location" bounce messages.

           Normally, the relocated(5) table is  specified  as  a  text  file  that
           serves as input to the postmap(1) 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/relocated"  to rebuild an
           indexed file after changing the corresponding relocated table.

           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 case, the lookups are done in a
           slightly different way as described  below  under  "REGULAR  EXPRESSION
           TABLES" or "TCP-BASED TABLES".

           Table lookups are case insensitive.

    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  regexp: or pcre: whose lookup fields can match both upper and
           lower case.

    TABLE FORMAT
           The input format for the postmap(1) command is as follows:

           o      An entry has one of the following form:

                       pattern      new_location

                  Where new_location specifies  contact  information  such  as  an
                  email  address, or perhaps a street address or telephone number.

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

           o      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
                  Matches user@domain. This form has  precedence  over  all  other
                  forms.

           user   Matches user@site when site is $myorigin, when site is listed in
                  $mydestination, or when site is listed  in  $inet_interfaces  or
                  $proxy_interfaces.

           @domain
                  Matches  other  addresses  in  domain.  This form has the lowest
                  precedence.

    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.

    REGULAR EXPRESSION TABLES
           This section describes how the table lookups change when the  table  is
           given  in  the form of regular expressions or when lookups are directed
           to a TCP-based server. For a description of regular  expression  lookup
           table  syntax,  see regexp_table(5) or pcre_table(5). For a description
           of the TCP client/server table lookup protocol, see tcp_table(5).  This
           feature is not available up to and including Postfix version 2.4.

           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 tcp_table(5).  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 main.cf parameters are  especially  relevant.   The  text
           below  provides  only  a  parameter  summary.  See postconf(5) for more
           details including examples.

           relocated_maps
                  List of lookup tables for relocated users or sites.

           Other parameters of interest:

           inet_interfaces
                  The network interface addresses that this system  receives  mail
                  on.   You  need  to  stop  and start Postfix when this parameter
                  changes.

           mydestination
                  List of domains that this mail system considers local.

           myorigin
                  The domain that is appended to locally-posted mail.

           proxy_interfaces
                  Other interfaces that this machine receives mail on by way of  a
                  proxy agent or network address translator.

    SEE ALSO
           trivial-rewrite(8), address resolver
           postmap(1), Postfix lookup table manager
           postconf(5), configuration parameters

    README FILES
           DATABASE_README, Postfix lookup table overview
           ADDRESS_REWRITING_README, 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

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