SpamAssassin

This Exchange Server plug-in utilizes familiar technologies from SmartPOP2Exchange to effectively filter spam with SpamAssassin, scan for viruses, and backup email.

This software provides a sleek and swift mail server equipped with a webmail feature, contacts, calendar and web admin panel. It features POP3/IMAP/SMTP/CalDAV/CardDAV/SSL, LDAP integration, antispam, antivirus, mobile and Outlook synchronization and supports external mail accounts while allowing multiple domains for users.

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.

JAM Software released a Windows version of SpamAssassin, a powerful anti-spam solution that works in conjunction with MTA software like MS Exchange or Hamster.