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.

    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  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 2.3.

           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 2.3.

           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)