ScanMail uses the Trend Micro Anti-spam Engine to implement heuristic-based policies when detecting unwanted content, or blocking, or automatically allowing a message. If you chose to install the End User Quarantine tool when installing ScanMail, ScanMail creates a spam folder on all of the mailboxes on the Exchange server where you installed ScanMail.

Content Scanning uses the Approved and Blocked Sender Lists and the Spam Filter to screen messages for spam.