Anti-Spam Filter 

Anti-Spam Filter is an innovative self-learning system, offering you spam protection without deleting the important correspondence. Anti-Spam Filter maintains its own collaborative spam-tracking database, which uses the signatures of spam messages.
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Outlook Spam Filter 

Outlook Spam Filter is an easy-to-use MS Outlook add-on that protects your Inbox against spam. Bayesian filtering technology. Auto-learning Ability. Quarantined e-mails are stored in a separate SPAM folder. POP3, IMAP, HTTP and MS Exchange support.
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mxORB 

mxORB is a server-side spam filter that consistently blocks over 98% of unsolicited commercial email (also known as spam) at a fraction of the cost of other filtering solutions.
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Out Spam 

Out Spam is a spam filter program. It can remove junk letters from a POP3 mail server without downloading them to a client computer. The principal way to separate mail is the use of worldwide black lists of spam mail servers.
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SpamWeed Anti-Spam Filter 

A powerful & easy-to-use spam filter that blocks over 95% spam instantly for Outlook, OE & other email clients. Spam are placed in a quarantine area & can be retrieved or deleted. SpamWeed learns from mistakes & its detection rate improves with use.
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Spam Trapper for Outlook 

Spam Trapper is a multilevel spam filter for Microsoft Outlook version 2000 and later. It is a plug-in component with clear convenient interface.
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