SpamAssassin in a Box is a powerful and reliable spam filter for
Service-Based Anti-Spam Solution for Windows
In addition to the famous email filter 'SpamAssassin', SpamAssassin in a Box also contains a Windows system service, making SpamAssassin controllable via the Windows Service Control Manager. Several enhancements (regarding, among others, stability, memory usage, signal handling) for running the spam filter on a Windows system are included.
The service monitors SpamAssassin's daemon 'SpamD' and updates the anti-spam rules automatically to guarantee a maximal efficiency of the spam filter.
Additional individual configuration options facilitate easy use. The software is suitable for use in Windows-based server systems, but is also supported by any other common Windows system.
SpamAssassin in a Box uses a scoring system to mark the likelihood of a email being spam. The spam score can then be used by the program handling your emails, usually the MTA (Message Transfer Agent), to decide how to proceed with the email. To obtain a complete anti-spam solution, you will have to connect SpamAssassin in a Box to your MTA. Many well-known MTAs support a corresponding connection or can be extended by this sort of link (e.g. Microsoft Exchange or hMailServer).
You require a virus scanner or a backup function? Then try the Exchange Server Toolbox or SmartPOP2Exchange. Both applications already include the SpamAssassin - you will not need to buy an additional version.