Spam Sleuth Lite   
http://www.bluesquirrel.com

Spam Sleuth Lite monitors your e- mail box behind the scenes and analyzes e- mail messages for spam and virus characteristics. If Spam Sleuth Lite determines an e- mail is spam, it yanks it out of the e-mail server, compresses it so that it takes as little space as possible on your computer. When your e-mail program gets your e- mail, the spam has already been removed and you can read your e- mail the same way you always have, but without sorting through the junk e-mail to find the gems. Friends - Add your friends e-mail addresses to allow messages through to your inbox. You can import addresses from your e-mail program, and you can use wild cards to quickly add domains. For example, if you want to receive all e-mail coming from Blue Squirrel you would enter *@bluesquirrel.com. Turing Test: Sends an email back to the sender and requires them to enter a validation code in order for Spam Sleuth to allow email messages through to your inbox. (Great way to know if you're dealing with a mindless machine or a real human on the other end.)

Ocean Mail Server   
http://www.codeocean.com

Ocean Mail Server is a robust and intuitive mail server with many advanced features. Users can access their mail using POP3, IMAP4 or the flexible web mail interface from any web browser. Each user can also configure an extensive set of individual account options via the web mail interface which include address book contacts, signatures, POP3 retrievals and anti-spam filtering. A full web remote administration interface is available to allow the server to be managed from any location. Strong mail filtering can be achieved using the built in anti-spam, antivirus and content filtering facilities. Other features include mailing lists, LDAP, ODBC and a range of tools and setup wizards to make configuration and diagnostics as simple as possible.

Email Sentinel Pro   
http://www.emailaddressmanager.com

Email Sentinel Pro smoothly prevents malware emails from reaching your mailbox folders and running viruses, worms or exploit attacks. It intercepts emails before they reach your Inbox email folders, thus reducing the infection risk to zero. While some of the latest email software versions include attachment protection features, these features are subject to programming bugs and exploits. If you don't feel like relying on the security features of your email software, then use Email Sentinel Pro to block virus attachments before they reach the Inbox folders of your email software, thus eliminating the risk of HTML email exploits. Moreover, for your convenience, Email Sentinel Pro will not simply erase such attachments, but it will password protect and quarantine them. If you decide such attachments are safe, you can always enter your password and unprotect the desired email attachment.

Active Email Monitor   
http://www.vicman.net

Active Email Monitor is an email utility that can check multiple accounts for email, but there is more to it than this. The program is more than just an "email checker" and can protect you from garbage mail and harmful elements that are often sent via email. Active Email Monitor will cut off junk email because it serves as a SPAM filter. In addition, Active Email Monitor can also protect you from harmful items that can be sent via email. The program is anti "bomb" and also anti virus! It can screen against harmful emails like the well-known "ILOVEYOU" or "Melissa" and other email worms. By being able to identify such harmful email before you ever open it, Active Email Monitor keeps you and your computer safe. The program can recognize potentially harmful items and can neutralize them before they cause you problems! The registered version of the program has a built-in feature that updates the programs filter database while you're online. As Active Email Monitor retrieves only headers of the messages, but not the entire ones, it works very fast even if messages are very large, so you can kill "BIG" SPAM letters directly in your mailbox, without wasting a lot of time and money downloading them.

Emjysoft Anti-Spam   
http://www.emjysoft.com

Block 99% of spam, viruses, spyware and phishing attempts before they reach your computer Emjysoft Anti-spam stop spam and dangerous emails containing viruses, spyware, and identity-theft schemes. His user friendly-interface makes it a simple, powerful, fast and safe tool. Protection for all email clients and servers ! Automatically updates from the Emjysoft server The Anti-spam database is updates every days.