GFI MailEssentials

GFI MailEssentials is an on-premise email security solution that bolts onto Microsoft Exchange or other SMTP servers. It uses multiple filters (Bayesian, DNSBL, greylisting) to detect spam, plus anti-phishing and anti-spoofing checks. Administrators can set up disclaimers or content policies for outbound mail. A quarantine console allows reviewing flagged messages. GFI also provides optional AV engines to block viruses. Detailed logs and reports highlight blocked senders, spam trends, and user-level stats. For small businesses with on-prem Exchange wanting a robust, locally hosted spam filter, GFI MailEssentials is a classic choice.