You may find this useful if you get many requests for the same information. It must conform to the same rules as receiving addresses in the Mail Forwarding section. There are several ways in which to specify the content of your auto-responder. With the third option, when you specify a file in your home directory, it allows you to upload a message containing any headers that you want.
Headers end with an empty line, and everything that follows is interpreted as the body text.
Once you upload the auto-responder text correctly, the caption should stop blinking. You may even do this for your Default Forward.