Problem Definition

All notifications email has a line and the sentence "Reply above this line" for users to reply above the line

Suggested Solution

An option to remove the line

Workaround

As a workaround, it is possible to hide the line through CSS:

1. Go to Project settings > Customer Notifications
2. Click on Edit templates button
3. Switch to CSS tab and apply:

   .jsd-reply-marker {
          display:none
   }
   

The limitation here is the line will still be in the email preview.