Surely to the chagrin of Nigerian princes everywhere, C-Command has released SpamSieve 2.8.5. The new update improves SpamSieve’s filtering accuracy, and also improves compatibility with new MacBook Pros, pre-release versions of Mac OS X Lion, and Freron Software’s new MailMate. Outlook and Entourage integrations now work more smoothly, and SpamSieve’s plug-in for Apple Mail now runs in 64-bit on Mac OS X 10.6 when possible. The software’s documentation and localization are improved, too. ($30 new, free update, 7.8 MB)
Still won't work with Thunderbird, which is too bad. T-Bird's spam filter isn't great.