JunkMatcher filters spam using powerful regular expressions, IP query against multiple blacklists (such as SpamCop.net) and various other techniques such as email property matching, HTML final rendering matching, etc. You can match against almost every bit of a message (including attachment filenames and charsets), and the raw material for matching is cleaned out for you to defeat some of the tricks spammers use to obfuscate their messages.
JunkMatcher can be added to Mail.app as a rule so it can be used hand-in-hand with Mail.app's built-in (statistical) junk filter. Users can decide what What's New
- Bug fixed: Fixed an installation issue for users upgrading from 1.5.8 or earlier. If everything has worked for you, you don't need to upgrade to this version. Requirements
PPC, Mac OS X 10.3 or later
Version 1.6.1 sourcecode available here.