Some Microsoft Office document components are detected as Executable files in Messaging Gateway 10.7. Message Audit Logs will typically show one of the following components in the Suspect Attachments section :
An option is being made in a future build to extract OLE 1.0 native data streams only, which will function similar to versions 10.6 and previous and will not generate these internal detections.
The attachment is being blocked by the executables file list. Removing the following 4 file types from that list may resolve the issue