Procedure

1. Click Next.
   The Step 2: Select Scanning Conditions screen appears.
2. Next to Take rule action when, select any condition matched (OR).
3. To enable the Name or extension condition, select the check box next to it.
4. Click Name or extension.
   The Attachment Name or Extension screen appears.
5. Select the file extensions to block or consider blocking.
6. Click Save.
   The Step 2: Select Scanning Conditions screen re-appears.