20+ Anti-Spam Technologies

Only close integration of the latest technologies and collaboration techniques directly to the core of the mail server engine can build an effective defense layer against spam, while maintaining the percentage of legitimate messages incorrectly identified as spam (false positives) to the minimum.


20+ technologies listed and grouped by functionality, sorted from protocol-level to user action based, following processing flowchart of the incoming traffic.


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Anti-Spam LIVE Service
DNSBL
Intrusion Prevention
Command monitoring and service rate control
Greylisting
Multiple RBL Servers
SURBL
SPF with SRS support
DomainKeys
Razor2
Blacklists, Whitelists, Bypass Files
Keyword filters
Body content filters
Forbidden character sets filter
Super-fast SpamAssassin derivative
Auto-learning Bayesian filter
Learn Rules
Quarantine
Challenge Response
Spam Traps / Honeypots
Processing of non-user accounts and outgoing messages