CleanMail is an all-inclusive Anti-Spam and Anti-Virus software that supports diverse mail servers like Lotus Notes/Domino, Microsoft Exchange, and IMail. It works with SMTP/POP3 and Microsoft Small Business Server (SBS).

CleanMail integrates the Clam Anti-Virus package and supports all popular virus checkers, ensuring that you're protected against all kinds of email-borne virus attacks. Plus, with CleanMail, you can view real-time statistics charts and reports online using a web browser or the CleanMail Admin application. You'll have access to spam statistics, mail logs, and a ranking of spam hosts, making it easier to stay on top of your email security needs.
But that's not all CleanMail has to offer. The software includes traffic limiting to protect your mail service from directory harvest attacks and mail backscatter, mail archiving to quarantine dubious messages or meet legal/regulatory obligations, and email notification to alert administrators about conditions that require their attention. The software's highly versatile filter pipeline even provides an open interface that allows for integration with custom mail filters, such as tools for email classification, automated mail processing, or server-based email encryption.
CleanMail is available as freeware for personal and non-commercial use. For those using the software for commercial purposes, a range of licenses is available at extremely low prices. The purchase of a license includes maintenance and updates for 12 months, and renewal licenses are available at a discount. Communities or non-profit organizations should inquire about special discounts. Overall, CleanMail is an excellent choice for anyone in need of comprehensive email security.
Version 5.9.3.1: OpenSSL updated, SpamAssassin rules updated, other fixes and optimizations
Version 5.9.2.1: TLS: changed the way certificate chains are loaded, SpamAssassin updates, other fixes and optimizations