KnockOut Spam is highly intelligent Bayesian spam filter and can be more accurate than the time consuming ordeal of sorting your spam by hand. It transparently integrates into Outlook and works with any email account you check in Outlook; POP, IMAP, Exchange and webmail accounts like Hotmail.KnockOut Spam comes trained with a library of several thousand spam messages, so it already knows what spam looks like.

Platforms: Win98 , WinME , Windows2000 , WinXP

System requirements: Outlook 2000/2002/XP/2003 and 5 Mb hard drive space