Therefor it is using the engine of Award-Winning SpamAssassin™ to check the emails.
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