MailStripper [L1 ] is a mail filtering application.
"MailStripper is an anti-spam mail scanner with hooks for anti-virus capability, and is intended to be Mail Transfer Agent (MTA) independent. That is, although so far it has only been tested with Sendmail, it should (in theory!) work with any MTA....
"Written entirely in Tcl (requires Tcl 8.3), it requires relatively little setting up and should run on any platform capable of running Tcl - including quite possibly Mac OS X and Microsoft Windows."