Confessing to be a dummy, I suggest you use the Web interface, which
is (IMHO) pretty slick (yes, I'm aware that a purist would use the
email commandline interface . . .).  Go to Manage the list, and
Templates, and scroll down to "bottom banner" and edit it.  Voila.

                                  -- Russ
                                __|~_
Russell A. Hunt            __|~_)_ __)_|~_    Professor of English
St. Thomas University      )_ __)_|_)__ __)  PHONE: (506) 452-0424
Fredericton, New Brunswick   |  )____) |       FAX: (506) 450-9615
E3B 5G3   CANADA          ___|____|____|____/    [log in to unmask]
                          \                /
      ~~~~~~~~~~~~ http://www.StThomasU.ca/~hunt/ ~~~~~~~~~~~~