Ayanami Rei's Journal: Looking for a generic mail classifier...

Does anyone know where I can get a generic mail classifier for Mozilla or Thunderbird? The junk mail filter is nice, but I'd like to be able to classify things as "other than junk" as well. It's easier than having to write filters manually... plus, I mean, junk mail filters based on naive classifiers are just special cases of the N-group classifier.

Any ideas?

Special case of SpamBayes?

[Marxist Hacker 42]

Why not take the spambayes filter (which is open source) and add new categories to the database beyond Ham and Spam? That way, unique writing styles can be used to move messages.