[TAG] SMTP-time despamming

[Ben Okopnik]

Just saw this at Freshmeat; sounds really sweet, particularly the
per-user configuration capability. Hopefully, the world is heading this
way...

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 Mail Avenger 0.5.1
 by xxx - Sun, Nov 21st 2004 02:48 PDT

About: Mail Avenger is a highly-configurable, MTA-independent SMTP
server. It allows you to reject spam during mail transactions, before
spooling messages in your local mail queue. You can specify site-wide
default policies for filtering mail, but individual users can also craft
their own policies by creating avenger scripts in their home
directories. It includes many features not supported by other SMTP
servers, including mail-bomb protection, integration with kernel
firewalls, TCP SYN fingerprint and network route recording, SMTP-level
analysis of client implementations, SMTP callbacks to verify sender
addresses, per-user mail scripts that run during SMTP transactions,
virtual domain to user mapping for the purposes of filtering, SPF
(sender policy framework), dynamic SPF query construction in mail filter
scripts, support for easily issuing multiple concurrent, asynchronous
DNS and SPF queries from filter scripts, and the ability to run spam
filters such as spamassassin on message bodies before replying to SMTP
DATA commands.

Changes: A critical memory handling bug was fixed in the avenger.local
and deliver utilities.
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* Ben Okopnik * okopnik.freeshell.org * Editor-in-Chief, Linux Gazette *
-*- See the Linux Gazette in its new home: <http://linuxgazette.net> -*-