When viewing the Message Audit Log (MAL) entry for a message in Messaging Gateway (SMG) the Identified attachments list contains one or more entries with "[empty filename]" or an encoded string.
This can occur for multiple reasons:
Content-Type: APPLICATION/OCTET-STREAM; name="[empty filename]"
Content-Disposition: attachment; filename="[empty filename]"; size=18944
Most issues with the malware decomposer engine processing some file names has been addressed in the currently available SMG versions and malware engines. Confirm that your SMG system version is updated and is receiving malware engine updates by:
Malware scanning engine version: