What does the spam side bar tell me?

The spam tools sidebar has two views.

Lists: Shows compacted Friends list, Blacklist and Filters views. When an email is selected in the message table it will be highlighted in one of these spam tools if listed.

Evaluation: This view shows the spam/good classification score for an email by each of the spam tools. The total classification score is shown at the bottom with a guage to show spam, good or neutral.