Over 14 anti-spam layers
DHA (Directory Harvest Attack protection)
SpamAssassin (Bayes, Heuristic, and SURBL)
Anti-phishing / anti-spoofing
RBL (Real-time blacklist servers) Custom whitelists and blacklists SMTP restrictions and more
Reduce server resource consumption
Block up to 80% of spam before it even reaches the server. Save hard drive space, RAM and CPU usage.