... All these modules are used to scan SMTP traffic for viruses. When processed by UserGate Mail Server, messages go through several filtering stages, including connection filtering, sender filtering, recipient filtering and content filtering. UserGate Mail Server supports the following spam filtering methods: DNSBL, RHSBL, Backscatter, MX, SPF, SURBL; Cloud Antispam ; Statistical filtering (Bayesian filtering method). In addition, UserGate Mail Server ...
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