KnockOut Spam transparently integrates into Outlook and works with any email account you check in Outlook; POP, IMAP, Exchange and Hotmail. Uses Bayesian filtering to filter your good email to your Inbox and spam and unsure emails to Inbox sub-folders named Spam and Unsure. Any miscategorized email can easily be corrected and KnockOut Spam will properly classify them next time you receive your email. Settings and features adjustments are accessible in Outlook from TOOLS > OPTIONS > KNOCKOUT SPAM.