GFI MailEssentials for Exchange/SMTP 15.0

The most effective way to beat spammers at their game is to use GFI MailEssentials™, a leading anti-spam solution that has won several awards.
GFI MailEssentials features two anti-spam engines, which combine with its agile anti-spam methodologies to give administrators protection from each new attack without the need to tweak GFI MailEssentials. IP reputation filtering, Bayesian filtering, greylisting, directory harvesting attack protection and other advanced anti-spam technologies are also included, ensuring the safe delivery of important emails.