Overview

jASEN is a pure java Anti Spam ENgine combining bayesian-like scanning with intelligent email inspection and classification

jASEN is best suited to developers wishing to integrate anti-spam services into an existing server based java email application, but can be used for client applications

History

The jASEN project started after the now famous article published by Paul Graham spawned a range of new anti-spam technologies based on Bayesian classification

Subsequent enhancements were made to the original proposal, with a significant improvement proposed by Gary Robinson which replaced the standard Bayesian approach with a superior* Chi Square computation, which was then further improved

Unfortunately almost all of the implementations of these approaches which followed were either commercial, or non-java. Thus jASEN was created to provide a free, extensible, pure java implementation of the wonderful work done by these (and many other) people

*in our humble opinion