DavidR
6
Opening the attachment.
It would be valid test if in the body or headers of the email it were possible to run the attachment when view in the preview pane of say O.E.
In that case if the email tried to automatically run the attachment then script defender would intercept any file types it is protecting.
Simply attaching a file to an ordinary email that didn’t trigger auto running (and sending it to yourself) of the attachment wouldn’t.
Avast may warn about a suspicious email (file type) when you receive it.