    SOCKETMAP_TABLE(5)                                          SOCKETMAP_TABLE(5)

    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  endponts  of the form unix:path-
           name: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 reply are sent  as  one  net-
           string object.

    REQUEST FORMAT
           The socketmap protocol supports only the lookup request.

           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.

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

    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
           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

                                                                SOCKETMAP_TABLE(5)