To activate the Enable attachment filtering within compressed files option:

1. Open the ScanMail Configuration Database named smconf.nsf.
2. Go to Configuration > Policies.
3. Open a policy or the default policy.
4. Under Mail Scan, mark the Enable mail scan rule check box.

   Note: To stop processing email when this rule is triggered, select also the Stop processing succeeding rules if the mail matches this rule (enable Exit Flag) check box.

5. Select Default Mail Scan or New Rule.
6. Go to Scan Options > Attachment Filter.
7. Tick the Enable attachment filter check box.

   

8. Under the Filter Attachment by File Type section, mark the Enable attachment filtering by file type check box.
9. Select Specified.
10. Specify the file type using any of the following options:
    • True file type(s) - This option enables you to select the file type from the dropdown list.
    • Extension name(s) - This option allows you to enter the file extensions.
11. Tick the Enable attachment filtering within compressed files check box.

    

    Click image to enlarge.

     

12. Save the changes.

If the attachment within a compressed file cannot still be blocked, send the following to Trend Micro Technical Support:

• SMID build and version
• Domino build and version
• OS build and version
• ScanMail Configuration Database
• Sample of the compressed file that cannot be blocked
• Description of the email flow. This includes where the email is being sent from/to. For example, Gmail or Yahoo mail to Domino mail server.