GFI MailEssentials - Server-based antispam & e-mail management solution for Exchange/Notes/SMTP servers. Spam is caught before the mail server, no need to deploy client software. Its advanced Spam detection technology is based on the following key features: Bayesian filtering technology (Over 98% capture rate with Bayesian alone!). Downloads updates to spam profile database. Mail header analysis & keyword checking. 3rd party DNS blacklists checking. Foreign language spam blocking. Automatic whitelist management. Custom blacklists. Other features of GFI MailEssentials include: Disclaimers, mail, centralized mail, mail reporting (e.g., spam filtering reports etc...), POP3 downloading, auto, seamless integration with Exchange Server 2000/2003 & 5.5, and more!