Price: for an additional $1.95 per mailbox per month you can add Spam filtering.

Symantec Brightmail AntiSpam™ combines effective spam catching with a high accuracy rate of 95% that prevents false positives. This award-winning spam protection not only defends against real-time spam attacks, but also proactively identifies first-time spam. With flexible and powerful spam management capabilities, it meets enterprise security needs without imposing a significant administrative burden. Leveraging multiple global operations centers, automated filter updates, and an unmatched view of global spam, Symantec allows administrators to solve their spam problem, not just manage it. 

Stops spam attacks in real time without compromising accuracy.

Users can manage their personal acceptable, white-listed sender list as well as the blocked, black listed, sender list. Users are given a quarantine management area. Users can additionally release email from this quarantine.

Multi-layered spam protection leverages over 17 different filtering technologies, including spam signatures, heuristics, reputation filters, language identification, and many proprietary methods.

Consolidated reporting gives administrators visibility into aggregated filtering performance for deployed servers.

Administrators can quickly create custom organization-wide content filters to handle messages based on content, sender information, or other criteria.