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"  in order to rebuild the
           indexed file after changing the 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 expres-
           sions, or lookups can be directed to TCP-based server.  In
           that  case,  the  lookups are done in a slightly different
           way as described below under "REGULAR  EXPRESSION  TABLES"
           and "TCP-BASED TABLES".

           Table lookups are case insensitive.

    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 logi-
                  cal 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 recip-
           ient  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 2.2.

           Each pattern is a regular expression that  is  applied  to
           the entire address being looked up. Thus, user@domain mail
           addresses are not broken 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  ta-
           ble,  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 interpolated 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 descrip-
           tion of the TCP client/server lookup protocol, see tcp_ta-
           ble(5).  This feature is not available up to and including
           Postfix version 2.2.

           Each lookup operation uses the entire address once.  Thus,
           user@domain  mail  addresses  are not broken up into their
           user and @domain constituent 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 Post-
                  fix 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 transla-
                  tor.

    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

                                                                      RELOCATED(5)