RELOCATED(5)

NAME
relocated - format of Postfix relocated table

SYNOPSIS
postmap /usr/local/etc/postfix/relocated

DESCRIPTION
The optional relocated table provides the information that is used in "user has moved to new_location" bounce messages. Normally, the relocated 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 /usr/local/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 expressions, 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:

•   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.

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

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

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.

@domain
    Matches every address 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). 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 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 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 description of the TCP client/server lookup protocol, see tcp_table(5). 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 to this topic. See the Postfix main.cf file for syntax details and for default values. Use the postfix reload command after a configuration change.

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.

SEE ALSO
postmap(1) create lookup table
pcre_table(5) format of PCRE tables
regexp_table(5) format of POSIX regular expression tables
tcp_table(5) TCP client/server table lookup protocol

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