A promising, free open source spam filter using a multifaceted spam filter system.
Pros & Cons:
Spamato is a promising, free open source spam filter with a difference. Rather than relying on one Bayesian spam filter to classify spam, Spamato uses a "multifaceted spam filter system that combines a variety of anti-spam techniques".
Like POPFile, it can work with any email client but additional plugins are available to integrate Spamato into Outlook, Thunderbird and the Mozilla Mail Client.
It requires additional software such as Java 5 (JRE) Environment or higher, .NET Framework 1.1 or higher (if using Outlook plugin in Windows).
Spamato supports these protocols: POP3 and IMAP.
Spamato was reviewed by Gizmos Freeware on based on version 0.99.9.