Our first line of defense is our GD Milter, which is a email filter designed to help ensure that email received by an email server has in fact been sent from a valid email server and not a bot or other mass mailer.

The second line of defense is SpamAssassin. If spam successfully passes the first test via GD Milter, SpamAssassin then scans the mail message based on content and assigns it a score. If the score is over a preset amount, the message is deleted.

SpamAssassin’s practical multi-technique approach, modularity, and extensibility continue to give it an advantage over other anti-spam systems. Due to these advantages, SpamAssassin is widely used in all aspects of email management, filtering incoming as well as outgoing email.