Comparison of a bunch of things like white lists and black lists, probably some spamassassin doesn't include: http://www.intra2net.com/en/support/antispam/index.php_sort=accuracy_order=desc.html
The fact that it lists higher accuracy for MAILSPIKE WL, and crazy high hit rate for DNSWL HI causes me to suspect a large portion of their mail comes from something like internal servers which are listed on those white lists. -- "This hurts quite a bit. Very painful." "Think of the sensation as reassurance that you are not dead yet. What you are feeling is life in you!" - Johnny The Homicidal Maniac http://www.ChaosReigns.com
