postprox 0.2.0 review

postprox is an SMTP proxy which copies an SMTP conversation between its input and another SMTP server, but spools the DATA portion to

License: Artistic License File size: 25K Developer: Andrew Wood

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postprox is an SMTP proxy which copies an SMTP conversation between its input and another SMTP server, but spools the DATA portion to a temporary file and runs a specified program on it before passing it on to the output server - or outputting an SMTP error code instead if the content filter says so.

postprox is design to do only one job: proxy SMTP conversations and pass message contents to another program to determine whether to accept or reject the message.

With this in mind, postprox is small and has a minimal feature set; its reduced complexity reduces the risk of bugs and security holes.

Requirements:
Postfix
Clam AntiVirus (optional)

What's New in This Release:
added $OUTFILE so filtering scripts can modify the email in transit
use putenv() instead of setenv() for better portability
capture IP address, HELO, sender/recipient for logging