SpamMonitor works in conjunction with file based mail servers, like Mdaemon, MailCoatch, MS SMTP service, Winroute, etc. It will monitor for new files with a certain extension and passes all new messages to the spam filter, SpamAssassin. SpamAssassin reads the messages and assigns each message a score based on a comprehensive set of tests. Next SpamMonitor will mark, move or delete each message based on your settings for different scores.