[Mailman-Users] Mailing List Problem

[Erick Mechler]

:: There is an email address on our mailing list that is receiving our
:: messages.  They do not wish to be on the list.  The address do not appear
:: anywhere within the list.

Is the user receiving the unwanted email in the same domain as the where 
the list is hosted?  Have you used the ~mailman/bin/list_members script to 
see if perhaps the CGI's are misrepresenting your list members perhaps?

There isn't really a lot of information in your post, so I'm not sure if 
I'm asking the right questions.

Cheers - Erick