NAME

       smtpprox-loopprevent - Transparent SMTP proxy to prevent mail forwarding loops

SYNOPSIS

       smtpprox-loopprevent [options] listen.addr:port talk.addr:port

DESCRIPTION

       This manual page explains the smtpprox-loopprevent program.

       smtpprox-loopprevent is a transparent SMTP proxy which rejects a message message if any of
       the recipient addresses (Rcpt To:) match a Delivered-To: header.

       smtpprox-loopprevent listens on the listen.addr:port  address  and  port  and  sends  smtp
       traffic unmodified to the SMTP server at talk.addr:port.

       smtpprox-loopprevent  was  written  to  be a Postfix before-queue content filter, but will
       function between any SMTP client and server.

OPTIONS

       --children=N
              The number of child  processes  to  maintain  in  the  service  pool.   Each  child
              terminates  after  servicing  a  random  number of messages between minperchild and
              maxperchild.
              [default 16]

       --minperchild=N
              Minimum number of messages serviced by a child process.
              [default 100]

       --maxperchild=N
              Maximum number of messages serviced by a child process.
              [default 200]

       --debugtrace=filename_prefix
              If debugtrace is specified, the prefix will have the  PID  appended  to  it  for  a
              separate  logfile  for  each  child, which will capture all the SMTP dialogues that
              child services. It looks like a snooper on the client side of the proxy.

SEE ALSO

       smtpprox(1)  http://www.postfix.org/SMTPD_PROXY_README.html

AUTHOR

       Jesse Norell