smtpprox-loopprevent (1)

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

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.

--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.

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

Jesse Norell