E-Mail Header/Footer Templates?

Hi, maybe I am dumb now... I am looking for the e-mail header and footer templates. I think I read about this that Dolphin 7.1 will support it but I am not able to find them?

(talking about something that is send below every message without typing it in every template)

they are here
templates/base/_email_header.html

and

templates/base/_email_footer.html

Thanks! These are getting attached automatically?