The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements whitelists, Bayesian, and basic anti-virus filtering to rid the planet of the blight of unsolicited email (UCE).
ASSP version 1.3.3.1 has been released to address a possible security issue in version 1.3.3
The issue does NOT affect versions other than 1.3.3
All users of 1.3.3 are urged to update.
The update can be obtained from the Download section along with install/upgrade packages already containing the updated version.