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.
Workaround:
The attachment is being blocked by the executables file list. Removing the following 4 file types from that list may resolve the issue