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    Command:

    tcp_table

    
    
    

    SYNOPSIS

           postmap -q "string" tcp:host:port
    
           postmap -q - tcp:host:port <inputfile
    
    
    

    DESCRIPTION

           The  Postfix  mail system uses optional tables for address rewriting or
           mail routing. These tables are usually in dbm or  db  format.  Alterna-
           tively, table lookups can be directed to a TCP server.
    
           To  find  out  what types of lookup tables your Postfix system supports
           use the "postconf -m" command.
    
           To test lookup tables, use the "postmap -q" command as described in the
           SYNOPSIS above.
    
    
    

    PROTOCOL DESCRIPTION

           The TCP map class implements a very simple protocol: the client sends a
           request, and the server sends one reply. Requests and replies are  sent
           as  one  line of ASCII text, terminated by the ASCII newline character.
           Request and reply parameters (see below) are separated by whitespace.
    
           Send and receive operations must complete in 100 seconds.
    
    
    

    REQUEST FORMAT

           Each request specifies a command, a lookup key, and possibly  a  lookup
           result.
    
           get SPACE key NEWLINE
                  Look up data under the specified key.
    
           put SPACE key SPACE value NEWLINE
                  This request is currently not implemented.
    
    
    

    REPLY FORMAT

           Each  reply specifies a status code and text. Replies must be no longer
           than 4096 characters including the newline terminator.
    
           500 SPACE text NEWLINE
                  In case of a lookup request, the requested data does not  exist.
                  In  case  of  an  update request, the request was rejected.  The
                  text describes the nature of the problem.
    
           400 SPACE text NEWLINE
                  This indicates an error condition. The text describes the nature
                  of the problem. The client should retry the request later.
    
           200 SPACE text NEWLINE
                  The request was successful. In the case of a lookup request, the
                  text contains an encoded version of the requested data.
    
    
    

    ENCODING

    
    

    BUGS

           Only the lookup method is currently implemented.
    
           The  client  does  not  hang  up when the connection is idle for a long
           time.
    
    
    

    SEE ALSO

           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
    
    
    

    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
    
                                                                      TCP_TABLE(5)
    
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