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Spam Filtering with Clean Mail

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CleanMail - Spam Filtering - The Treatment

CleanMail utilizes three layers of protection to analyze each piece of email and to detect and act on suspected spam.

  • Blacklisting: GHI uses a proprietary blacklist. Our blacklist, unlike other ineffictive commercial blacklists, contains only the addresses of the most egregious spammers on the Internet; Our blacklist can immediately block nearly 10 percent of our customer's inbound spam.

  • Fingerprinting: Messages not blocked by blacklisting are fingerprinted to detect matches with known spam message characteristics. GHI's fingerprinting technology leverages knowledge gained from filtering mail for our entire customer base. The fingerprinting database aggregates data from all spam blocked by our system allowing the fingerprinting process to become more intelligent and refined as more mail is processed.

  • Rules-based scoring: Scores are assigned to messages based on more than 20,000 rules that embody and define characteristics of spam and legitimate email. Points are added to the score if a message contains characteristics of spam; and points are subtracted if it contains many characteristics of legitimate email. When a message's score reaches a defined threshold, it is flagged as spam. Message characteristics we evaluate and score include:

  • Phrases in the body and subject of the message
  • Formation of headers (i.e., Message-ID, Received, random characters)
  • Originating mail server / Originating mail agent
  • From and SMTP From address

Spam Treatment

Most customers choose to quarantine messages identified as spam outside their network. Quarantined messages are stored and deleted after 15 days. Customers can review quarantined messages and retrieve improperly blocked messages through SpamShark, a Web-based tool.

Unlike most competitors, CleanMail has a very low incidence of blocking legitimate email - less than one for every 250,000 emails received (less than 0.0004 percent).

Do we still have your interest? Then read on and learn about the tremendous benefits of CleanMail.

Or contact us directly today regarding our ASP Spam Filtering product, CleanMail.

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