"WARNING: EXTERNAL EMAIL. Do NOT CLICK on links or open attachments"
A way to add a Warning Message to all incoming emails that do not match the current domain?
It seems like this would be pretty easy to implement within the CPanel Global Email Filters. If another option was added to the actions, ie: " Add Note to Body" then have a text box to define the "Text" of the message. This would solve this issue. All of the current rules already apply, such as the Rule for From - Does Not Contain - then we could specify the domain or any text, the Action would then be to "Add Note to Body".