SPASTIC (Simple Procmail Anti-Spam Templates Improved Code) allows filtering of e-mail using simple keywords. The scripts, by default, have different filters for the headers and the body of messages. It also includes a whitelist.
authd mail policy server; this server talks to postfix, sendmail, and anything else that wants to link to libauthd.a. The code has been stable for years, but the documentation brings us from Mature to Beta. This project has had no changes in 2+ years oth