When messages are processed by the message security service, custom header fields are placed in email-message headers. This header information can be useful for either determining email disposition or for handling support issues.

This chapter describes the following header fields added by the message security service:

The service minimizes processing time by only scanning for categories that the user has enabled. For example, if a user turns off the commercial category, the commercial score is not completed or displayed. If you do not have access to Industry Heuristics (an optional feature), the Industry Heuristics score is not calculated or displayed.