SpamViper combines dozens of different anti spam filters with an intuitive yet powerful interface to allow the subscriber to use webmail or just control the spam settings and deal with messages in quarantine. The subscriber has both webmail and industry standard POP3 access to their email.

SpamViper filtering consists of:

• Multi Level virus scanning. The email is broken apart into a separate file for each attachment and message body part, then each part is scanned by our state of the art virus software. The virus databases are updated every 20 minutes so new viruses are caught before they can spread.
• The Distributed CheckSum System. This system tracks how many copies of similar emails have been received by other mail servers in the DCC network. The more copies have been seen in the last 24 hours, the more likely it is to be spam. We add more than 20 Million spam signatures to our database each day!
• Heuristic rules examining email subject and body for literally thousands of key phrases and layouts. These systems use Bayesian rule sets to learn from feedback from all of our subscribers. If a spam slips through and the subscriber forwards it to the “SPAM@YOURDOMAIN” address the system learns – if a message is marked as spam, but is not and the subscriber forwards it to the NOTSPAM@YOURDOMAIN address the system learns.
• Open relay Block lists. These internet databases track the IP addresses of mail servers known to be wide open to spammers.
• Known Spammer databases.
• An email signature database. Once a given email has been positively identified as spam a digital “fingerprint” is taken of the email and entered in a database. Every new email is checked against this database – if the fingerprint matches there is 100% surety that the email is spam. In order to eliminate “false positives” a team of five full time (and very stressed) employees reviews every new mail fingerprint before it is entered in the database.

These systems run on multiple load balanced clusters of servers. We frequently see as many as 20,000 inbound messages per minute to our filtering clusters with no degradation of service. Servers are added to clusters as needed to always stay ahead of the growth curve.