A wide range of tests is performed on any email passing Pinjo. The results retrieved will deliver a score to the particular email message. The administrator can decide at what score the messages are considered as spam, or may even decide that messages at a certain score may be dropped.

Some of the tests performed are:

• Content keywords (such as Viagra, drugs etc)
• Bayesian filtering
• Valid date format
• Valid address formats
• Valid subject formats
• Forged headers
• Too much caps character
• Too much HTML and/or images
• Font color same as background color

Lots more tests are performed. For a complete range of tests performed go to Spamassassin Tests performed page