Majordomo mails itself

[Super <super @ puck . nether . net>]

I apologize if this is a repeat of an older questions but I searched the archive
and didn't see the answer. I have someone who feels the need to send a mail that
looks like it is from Majordomo to itself. Majordomo then goes to process it,
errors and returns it which itactually sends to itself.

Any idea how to prevcent this from happening?
					regards
				Daviud Low