How to block double extension filenames

Updated 11 months ago by admin

To block double extension filenames like .exe.html you can create the following Message Rule.

  1. Navigate to Products, Email Security and then Message Rules. Click the + button to create a new rule.
  2. Add the Direction condition and set to Inbound.
  3. Add the Attachment Name condition and select Double Extension.
  4. Add the Add to Spam Score action and set the value to 105.

The rule should look like this:

  1. Move or drag the rule above the Confirmed Spam and Possible Spam rules so that it triggers first.

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