NAME

       socketmap_table - Postfix socketmap table lookup client

SYNOPSIS

       postmap -q "string" socketmap:inet:host:port:name
       postmap -q "string" socketmap:unix:pathname:name

       postmap -q - socketmap:inet:host:port:name <inputfile
       postmap -q - socketmap:unix:pathname:name <inputfile

DESCRIPTION

       The Postfix mail system uses optional tables for address rewriting, mail routing or policy
       lookup.

       The Postfix socketmap client expects TCP endpoint names of the  form  inet:host:port:name,
       or  UNIX-domain  endpoints  of the form unix:pathname:name.  In both cases, name specifies
       the name field in a socketmap client request (see "REQUEST FORMAT" below).

PROTOCOL

       Socketmaps use a simple protocol: the client sends one request, and the server  sends  one
       reply.  Each request and each reply are sent as one netstring object.

REQUEST FORMAT

       The  socketmap  protocol  supports only the lookup request.  The request has the following
       form:

       name <space> key
              Search the named socketmap for the specified key.

       Postfix will not generate partial search keys such as domain names  without  one  or  more
       subdomains,  network  addresses  without  one  or  more least-significant octets, or email
       addresses without the localpart, address extension or domain  portion.  This  behavior  is
       also found with cidr:, pcre:, and regexp: tables.

REPLY FORMAT

       The  Postfix  socketmap client requires that replies are not longer than 100000 characters
       (not including the netstring encapsulation). Replies must have the following form:

       OK <space> data
              The requested data was found.

       NOTFOUND <space>
              The requested data was not found.

       TEMP <space> reason

       TIMEOUT <space> reason

       PERM <space> reason
              The request failed. The reason, if non-empty, is descriptive text.

SECURITY

       This map cannot be used for security-sensitive information,
       because neither the connection nor the server are authenticated.

SEE ALSO

       http://cr.yp.to/proto/netstrings.txt, netstring definition
       postconf(1), Postfix supported lookup tables
       postmap(1), Postfix lookup table manager
       regexp_table(5), format of regular expression tables
       pcre_table(5), format of PCRE tables
       cidr_table(5), format of CIDR tables

README FILES

       Use "postconf readme_directory" or "postconf html_directory" to locate this information.
       DATABASE_README, Postfix lookup table overview

BUGS

       The protocol limits are not yet configurable.

LICENSE

       The Secure Mailer license must be distributed with this software.

HISTORY

       Socketmap support was introduced with Postfix version 2.10.

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

                                                                               SOCKETMAP_TABLE(5)