SpamAssassin in a Box is a spam filter software for Windows that includes SpamAssassin as well as a Windows system service for easy management via the Service Control Manager. It is a powerful and dependable solution for filtering spam emails.

SpamAssassin in a Box offers an extraordinary collection of individual configuration options and updates the anti-spam rules automatically. It is exceptionally beneficial for Windows-based server systems and is also widely supported by other common Windows systems. The program uses a comprehensive scoring system to estimate the probability of an email being spam. The actual spam score is then employed by a subsequent program called the Message Transfer Agent (MTA). This program decides how to treat the email according to the scoring data.
In order to attain a complete anti-spam solution, you can easily connect SpamAssassin in a Box to your MTA. Many well-known MTAs support such connections, including ones like Microsoft Exchange or hMailServer which can be extended to accommodate additional links. Overall, SpamAssassin in a Box is an excellent software for those seeking a reliable and effective tool for eliminating spam from their Windows-based system or server.
Version 2.2.2:
* Native 64bit support: additional memory for spamd
* NEW: ListenIP supports multiple addresses
* No restart of service during open connection
* several errors in service and SPAM tests fixed
* http://www.jam-software.com/spamassassin_in_a_box/changes.shtml