• If To contains 'undisclosed', add 9 to the score;
• If X-Poco-Score does not contain '+' and To does not contain '@', add 8 to the score;
• If X-Poco-Score does not contain '+' and neither To nor CC contain the result of %email% and %replyto%, add 7 to the score;
• If X-Mailer is not present, add 3 to the score;
• If X-Mailer contains 'Blat', add 8 to the score;
• If the Subject is all uppercase, add 4 to the score;
• If the subject contains '!!', add 4 to the score;
• If the subject contains "      " (six spaces) add 4 to the score;
• If the email is from someone in the addressbook, subtract 20 from the score;
• If the email is from someone in the 'exceptsenders' list (<Pocomail>/Mail/exceptsenders.txt), subtract 100 from the score;
• If the email is to (To or CC) someone in the 'exceptreceivers' list (<Pocomail>/Mail/exceptreceivers.txt), subtract 100 from the score;
• If the email is to (To or CC) someone in the addressbooks, subtract 4 from the score;
• If the email is from someone NOT in the addressbooks, add 2 to the score;
• If the email is from someone in the 'junksenders' (<Pocomail>/Mail/junksenders.txt) list, add 100 to the score;
• If the email has a subject that is in the 'junksubjects' (<Pocomail>/Mail/junksubjects.txt), add 100 to the score;
• Apply the scores as listed in the 'junkbody' (<Pocomail>/Mail/junkbody.txt) file;
• If the number of recipients is at least 5, add 5 to the score.

Note: It is possible to customize the values used in the rules.