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
       Use  "postconf readme_directory" or "postconf html_directory" to locate
       this information.
       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

                                                                  RELOCATED(5)