The higher the score, the more likely your e-mail will be considered as spam by ISPs. Messages with higher scores have a higher probability of getting filtered before reaching their recipients.

0.0 - 4.5: Reasonably clean. No problems except the minor ones below; clean up any easy-to-find issues.

4.6 - 7.0: Moderate penalty score. Clean up as many issues as possible (below)

7.1 - 10.0: Getting into dangerous territory; clean up any large issues and the easy-to-find smaller penalties

10.1 - 13.0: Likely over ISP limits; review and clean

13.1+: Major problems; a good overhaul is needed. Systematically clean point by point and then re-test (this may require two or three checks).