POPFile

POPFile classifies email into categories you define. It can sort into spam and not spam or into any number of categories you like (e.g. work, personal, important...

Free Open Source Mac Windows Linux

SpamSieve

Save time by adding powerful spam filtering to the e-mail client on your Mac. One of the only standalone spam filtering softwares for Mac.

Commercial Mac

Spamato

Spamato is a spam filter system that combines several anti-spam techniques, from which thousands of users benefit. It is available as an add-on for Thunderbird and...

• Discontinued The project is no longer developed. Last version, 0.99.9, released in August 2007, can be still downloaded from SourceForge.

Free Open Source Mac Windows Linux

SpamBayes

The SpamBayes project is working on developing a statistical (commonly, although a little inaccurately, referred to as Bayesian) anti-spam filter, initially based on the...

Free Open Source Mac Windows Linux IncrediMail Microsoft Office Outlook ... Thunderbird Microsoft Outlook Express Windows Live Mail