Praetor's default rules, referred to as ADVANCED, instantly offer protection against spam email and other email that may contain suspicious attachments. 

These ADVANCED pre-configured rules occur before Praetor's Bayesian statistical filtering to eliminate the statistical possibility that undesirable messages may be deemed as good and desirable messages may be detected to have spam characteristics

The following are the pre-filter rules performed by Praetor:

Reject messages from sources listed on the DNSBL server(s) Reject messages that contain any attachment found on the banned attachment list Quarantine messages that contain any attachment found on the suspicious attachment list Accept messages from senders in any approved domain list Accept messages from senders on the approved listserver address list Bayesian filter tests for spam and non-spam based upon the cut-off values for bad and good mail Quarantine messages containing invisible HTML ink, where the color of the text is so close to the background that the text is not readable Quarantine messages containing tiny HTML text Quarantine messages containing obfuscated URLs, or links containing IP addresses instead of domain names or port numbers Accept messages with computed spamicity in the unsure range, between the two cut-off values

Beyond these default rules, Praetor's Rule Wizard give administrators, the flexibility to create rules that match their specific needs.