Michael Tsai has released SpamSieve 1.2, an update to his shareware utility that brings powerful Bayesian spam filtering to various email clients such as Mailsmith, Entourage and PowerMail. Version 1.2 adds support for Emailer and Eudora (5.2 and later) and includes a host of other improvements and bug fixes. SpamSieve requires Mac OS X and sells for US$20.