[Mailman-Users] Addressing

[Lynn Danielson]

I'd like to get mailman/sendmail to use an alternate
address in the the To: header.  

If I have a listserver on machine-A.com with a cname
of machine-B.com and perhaps an alternate DNS of
myhost.org, how can I configure mailman or sendmail
to address messages to one of these alternate names?
When I set up Mailman, I specified machine-B.com. This
shows up on all of the Mailman web page interfaces.
But when I receive mail from the list, it's always
addressed "To: listname at machine-a.com" instead of
"To: listname at machine-b.com".  Any suggestions for
how to fix this?

Lynn Danielson