Solutions Bayesain Filter Eliminates 98% of Spam

Bayesain Filter Eliminates 98% of Spam

Banyan International Corporation is the nation's leading provider of emergency medical kits. In order to maintain that leadership role, Banyan depends on strong lines of communication with their stakeholders. When one of those lines of communication, email, became mired with spam, they asked us to help.

Spam is more than just a wastes of employee time and network resources. It is a dangerous breeding ground for viruses and spyware, which makes spam protection a vital component of network security.

Banyan receives an average of seven-hundred-thirty messages a day. Eighty-three percent of those messages are spam. While Banyan's anti-virus package offered some spam protection in the form of keyword checking, maintaining the list of keywords was more time consuming than dealing with the spam manually. Banyan needed an anti-spam solution that featured a Bayesian spam filter.

Bayesian spam filters calculate the probability of a message being spam based on its contents. Unlike simple content-based filters, Bayesian spam filtering learns from spam and from good mail, resulting in a very robust, adaptive and efficient anti-spam approach that, best of all, returns hardly any false positives.

We decided to implement GFI MailEssentials, primarily because of its Bayesian spam filter, but also for a number of other features. GFI MailEssentials integrates seamlessly with Microsoft Exchange. GFI MailEssentials is server-based, eliminating the deployment and administration hassle of desktop-based anti-spam products. GFI MailEssentials can download updates to the Bayesian filter from the GFI site, ensuring that it recognizes the latest spam and spamming techniques. GFI MailEssentials can route spam to a public folder, allowing users to easily review email that has been flagged as spam. GFI MailEssentials automatically adds email recipients to a whitelist to ensure that email from particular senders is never flagged as spam. GFI MailEssentials supports third party DNS blacklists, which are public databases of known spammers. GFI MailEssentials detects forged headers, encoded IPs, spam mutation, and spam sent from invalid domains.

The result of this solution has been phenomenal. Banyan has been saved the clutter of over 100,000 spam messages in the last six months. If dealing with each of those messages took only three seconds, dealing with all of them would have taken over eighty hours. That's two weeks of an employee's time!

Technology Spotlight

GFI EssentialsGFI MailEssentials
GFI MailEssentials with its Bayesian filter was used to filter spam.

Microsoft ExchangeMicrosoft Exchange
Basic email service was provided by Microsoft Exchange.









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