We are using Symantec Mail Security for Microsoft Exchange (just updated to v. 6.5.8.285) with MS Exchange Server 2007, and have seen spurious error messages ever since we switched from Postini to Mimecast for spam filtering.  The crux of the matter is that Mimecast's e-mail notifications about "held" mail (potential spam) are created & sent in HTML-only MIME format (no attachment, not multi-part), but your software sends out spurious warnings about attachments that violate defined Content Enforcement rules for attachment names.  The match list for the attachment filenames includes "*.COM" , and the Subject: line of each of these messages always ends in ".com".  Your release notes for version 7 of the software lead me to believe that it will be no better, as there is a documented problem with Subject: lines being parsed when they should not be.

Please fix!  Thanks -Stuart (201)767-0255 x132