Praetor Statistics

Computer Mail Services, Inc. (CMS) regularly tracks the effectiveness of the Praetor Messaging Firewall running on our own mail server.  

The following graphs, containing information detailing how effective Praetor is against the daily stream of spam and virus infected mail while maintaining a very low false positive rate (FPR).

The Praetor site used in these tests started at the default Bayesian and DNS blacklist settings.  Some lists were modified to add entries for normal email traffic that CMS receives.

Praetor maintained very low false positive numbers over the test period by consistently averaging a FPR rate of less than 0.01%. 

A false positive rate of 0 was achieved on over 85% of the days in the testing period. 

The frequency of these days increased as the Bayesian Filter was trained with additional spam and non-spam (ham) messages received over the testing period.

False positives, when they do occur, may be reviewed and approved by individual users through the browser-based Personal Log Viewer.

As with any email system today, the testing period saw a flood of spam directed at employees of CMS.

In general 85% to 95% of all email received by CMS during the testing period was designated as spam by Praetor.

Praetor quarantines any email it detects as spam, holding it off of the mail server.  This action frees server resources and bandwidth.