The Attachment MIME Type List condition enables you to monitor for an attachment that is of the same MIME type as the type in one or more lists. Attachments, such as compressed archive and Microsoft Office documents are also scanned. The scanner opens a compressed archive file and scans the file types within it.
Select Services > Data Protection > Email Policies.
Open the policy that you want to amend, or choose to create a new policy.
Click Add Rule and select the Attachment MIME Type List condition from the Add a condition drop-down list.
Click Browse for a Filename List, select one or more lists and click Add.
Choose from the following settings:
The condition is satisfied if the MIME type of the file matches any of the MIME types in the selected lists.
The condition is satisfied if the MIME type of the file does not match any of the MIME types in the selected lists.
Add more conditions to the rule or click Save.