Spam Assassin Anti-SPAM Support Interface Cost: $49 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions Spam Assassin Anti-SPAM Support Interface: Add the SpamAssassin Anti-SPAM management interface to your Plesk software. Activating this on your license adds an additional Spam filter to your system that is configurable Server-wide or at the domain level. SpamAssassin is an open source mail filter to identify spam. Using its rule base, it uses a wide range of heuristic tests on mail headers and body text to identify "SPAM".