relocated - format of Postfix relocated table
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 /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. In that case, the lookups are done in a slightly different
way as described below.
Table lookups are case insensitive.
The format of the table is as follows:
o An entry has one of the following form:
Where new_location specifies contact information such as an email address, or per-
haps 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.
With lookups from indexed files such as DB or DBM, or from networked tables such as NIS,
LDAP or SQL, the key field is one of the following:
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.
Matches every address in domain. This form has the lowest precedence.
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,
REGULAR EXPRESSION TABLES
This section describes how the table lookups change when the table is given in the form of
regular expressions. For a description of regular expression lookup table syntax, see reg-
exp_table(5) or pcre_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 con-
stituent 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 paren-
thesized substrings from the pattern can be interpolated as $1, $2 and so on.
The table format does not understand quoting conventions.
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.
List of lookup tables for relocated users or sites.
Other parameters of interest:
The network interface addresses that this system receives mail on.
List of domains that this mail system considers local.
The domain that is appended to locally-posted mail.
postmap(1) create lookup table
pcre_table(5) format of PCRE tables
regexp_table(5) format of POSIX regular expression tables
The Secure Mailer license must be distributed with this software.
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA