Majordomo configuration

["Bob Dushok" <root @ luzerne . edu>]

I'm having some difficulty setting up Majordomo due to my current e-mail
server configuration.  I'm using IPlanet Messaging server.  This server
doesn't appear to be compatible with Majordomo so I setup a second
server (Linux based) running sendmail.  Majordomo is working great, but
appears confused :)

I've been assigning people e-mail addresses without a hostname.  For
example, I'm bdushok@mail.luzerne.edu, but I've been telling people I'm
bdushok@luzerne.edu.  Mail.luzerne.edu is in the mx record of DNS and is
also the first domain server listed in my domain.  Mail finds its way to
the correct server :)

I have majordomo running on a server named lists.luzerne.edu.  When
someone attempts to subscribe to a list and majordomo sees @luzerne.edu
in their address, it attempts to deliver a message locally instead of to
the mailserver mail.luzerne.edu.

Is there a way I can tell majordomo (or possibly sendmail) that any
address listed as @luzerne.edu should be routed to mail.luzerne.edu?

Thanks,
Bob