SpamSweep

SpamSweep Publisher's Description:
SpamSweep is an advanced bayesian spam filter with a simple, easy to understand
interface. SpamSweep seamlessly combines many filtering technologies, including domain and relay blacklists, sender whitelisting, and a bayesian filter to automatically delete spam messages before they're downloaded by your email client.

SpamSweep can notify you when you have new good mail by playing a sound, displaying the new messages in a floating window, or launching your email client.

What's new in this version:

* Added support for IMAP accounts.
* You can now create custom rule filters.
* Fixed a DNS problem that could cause extremely slow filtering performance.
* SpamSweep can now be set to filter accounts at launch.
* New "Hide automatically" option hides SpamSweep whenever you switch to another application.
* Fixed bug that prevented some alert sounds from playing on Intel Macs.
* Much improved foreign language support.
* Now compatible with Leopard.
* Various other improvements.