How is everyone today?

I was wondering if anyone has any experience in installing and running mailman on a sendmail-based smtp gateway. I've looked in multiple places, including the FAQ and the archives. If anyone has any pointers, it would be very much appreciated.

We are migrating from a linux based sendmail server to exchange. The current sendmail server will be the future smtp gateway, and I plan on forwarding all user email to the internal exchange server through the use of a mailertable entry. The sendmail server will have no users on it.

This server however does have a handful of email lists for the company. I'd like to keep this in place. Does anyone know of a way to send the various aliases through to the mailman binaries, but send the remainder of the traffic to the internal mail server?

I've built a test environment, and can't seem to get it right. This might be more of a sendmail issue between alias and mailertable precedence, but I figure someone from here may have run into this.

Thank you in advance for any assistance or links.

--Aaron