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IceWarp Server integrates many Anti-Spam technologies to protect your Users from Spam.
IceWarp Server uses SpamAssassin, Bayesian Filters, Greylisting, Razor and Content Filters, giving you one of the most comprehensive AntiSpam toolsets on the market today.
Whether a message is marked as spam or not is based on a score, up to 10. All of the Anti-Spam technologies modify this score according to their findings. At the end of the whole process IceWarp Server checks the spam score and acts accordingly. You have control over what spam score causes a message be classified as Spam, quarantined, or deleted.