Junk-Out 2007 for Outlook 2007/2003 2.02
Junk-Out is an add-in for Microsoft Outlook that uses statistical (Bayesian) techniques to filter out junk e-mail (i.e. SPAM) from incoming messages.

Spam Trapper for Outlook 1.3.3
Spam Trapper is a multilevel spam filter for Microsoft Outlook version 2000 and later. It is a plug-in component with clear convenient interface. The first level checks your address book and validates all letters from your clients. So letters from your friends and colleagues are never processed as spam. The last level is a Bayes Filter. Any level can be switched off. Spam Trapper does not work with Outlook Express.

AntispamSniper for The Bat! 3.0.1.2
AntispamSniper for TheBat! provides a professional antispam and anti-phishing protection for your mailbox. The unique combination of several methods for automatic email classification shows excellent filtering quality for all kinds of spam, including graphical spam with random text. The plug-in has a built-in option which allows spam deletion from the server by headers.

InBoxer for Outlook Spam 2.0
Award-winning InBoxer spam filter is top rated by reviewers around the world. Effectively blocks Outlook spam while making sure that you see the messages you need. How? InBoxer analyzes your mail folders to create a custom antispam filter just for you. New BlackBerry, Treo and handheld device plug-ins for spam-free remote access. Free trial.

Nelson Email Organizer - NEO 2.5.1
A plug-in for Microsoft Outlook 97/98/2000/2002(XP), NEO works with Outlook message stores and Exchange mailboxes. Spot important emails in the daily flood. NEO automatically categorizes email messages from your correspondents separately from Bulk mail, Ezines and Lists. With a single click NEO can hide all the junk and show only the emails from real people! NEO's Active Mail and To-do folders give you a better way to action your email.

SpamBrave for Outlook Express 5.5
A Spam filtering plug-in for Outlook Express and Windows Mail prevents annoying spam and junk emails from polluting your Inbox. Never misses e-mails from your friends and colleagues. Allows or blocks email addresses or whole Internet domains you want. Bounces emails back to spammers. Reports spam to the sender's ISP. Automatically cleans the Spam folder. Built-in Backup and Restore Wizard. Statistics on the work done. Multilanguage interface.

SPAMfighter Standard 6.4.07
SPAMfighter is an anti-spam/phishing tool for Outlook/Express and Windows Mail. Whenever new mail arrives, it will automatically be scanned by the SPAMfighter server. If it's spam, it will be moved to a spam folder. Join over 5.4 million SPAMfighters across the globe with a clean inbox. Languages: English, German, French, Spanish, Danish, Suomi, Chinese, Japanese, Russian, Swedish, Norwegian, Dutch, Italian, Greek, Bulgarian, Czech, Thai.

SpamBrave Lite for Outlook Express 5.5
A free Bayesian spam filtering plug-in for Outlook Express and Windows Mail. Stops over 97% of spam.

AntispamSniper for Outlook Express 2.8.1.1
AntispamSniper for Outlook Express provides a professional antispam and anti-phishing protection for your mailbox. The unique combination of several methods for automatic email classification shows excellent filtering quality for all kinds of spam, including graphical spam with random text. The plug-in has a built-in option which allows spam deletion from the server by headers.

AntispamSniper for Windows Mail 2.8.1.1
AntispamSniper for Windows Mail provides a professional antispam and anti-phishing protection for your mailbox. The unique combination of several methods for automatic email classification shows excellent filtering quality for all kinds of spam, including graphical spam with random text. The plug-in has a built-in option which allows spam deletion from the server by headers.