FTGate 5.0
FTGate is a powerful Windows(TM) mail server suite that combines exceptional mail handling facilities with comprehensive Groupware functionality. FTGate features include SMTP, POP3, calendaring, contacts, IMAP, enhanced security, advanced anti-spam facilities, anti-virus support, multiple domains, Web Administration, WebMail, instant messaging, SSL, SPF and much more.

POP3 Cleaner PRO 1.40
A powerful manual/automatic mailbox cleaning utility with anti-spam capabilities for Windows. You can preview and delete unwanted e-mail messages directly from the mail server and retrieve the rest with your e-mail client (e.g. MS Outlook). Every message is shown with its sender's address, subject, size and the date it was received. POP3 Cleaner PRO can also run fully automated on the system tray and act as a powerful anti-spam filter.

TNL Antispam 1.1.2582
TNL Antispam will check your POP3 Email box and weed through your incoming mail messages. There are several processes that TNL Antispam uses to eliminate spam from your inbox. Using a combination of filter and challenge & response technology.

GFI MailEssentials for Exchange/SMTP 14
GFI MailEssentials is a server based anti-spam, anti-phishing and email management solution for Exchange/SMTP used by 80,000 customers worldwide. This solution uses two anti-spam engines to ensure a high capture rate and is available at an unbeatable price. With GFI MailEssentials, spam is caught before reaching the mail server, eliminating the need for client software. It also blocks phishing emails and adds email management tools to the server.

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.

Pocket SpamFilter 1.5.5.0
Pocket SpamFilter is the PPC 2002, WM 2003/WM5/WM6 application that helps you keep your email account free of spam. Reduce your bandwidth usage by inspecting your email account before downloading. Features: - Powerful automatic email filtering - Support for unlimited number of POP3 email accounts - Download info only, headers, headers + lines or complete message body - Delete emails without downloading them - Thousands of predefined filters

Espresso 1.12.68
Espresso permissions-based email client completely eliminates spam as you define it from your Inbox. Espresso's powerful email filter is based on a sophisticated challenge-response system. All messages from approved and trusted senders are immediately accepted. With a selection of options available, you decide how to handle messages from unknown senders. Espresso delivers all the email you want to read and blocks all the email you don't want.

mxORB 2.3
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. mxORB is packed with all of the features you will need to eliminate spam. The amazing low price coupled with a success rate of over 98% gives it an unassailable position in today's marketplace.

Traffic Control 3.1.009
Traffic Control performs traffic shaping for email, which allows mail servers to handle three times the email traffic while significantly reducing spam volume. Traffic Control combines an ultra efficient multiplexing SMTP proxy with real-time reputation data to prioritize email traffic before it hits the mail server.

GFI MailDefense Suite 1
Anti-virus, anti-spam & anti-phishing suite for Exchange server. It uses multiple technologies, such as Bayesian filtering to remove spam and up to five anti-virus engines to clean inbound email from viruses and malware. GFI MailDefense Suite offers the highest spam detection rate and a low rate of false positives. It is easy to deploy and ships at an unbeatable price.