I'm running a Redhat 8.0 server. Im currently using sendmail.

The company I work for has dozens of different clients that we provide various services to. One service that we would like to provide is the ability to handle their subscriber lists to their catalogs. (i.e...monthly mail regarding specials and the such)

Is their a "bulk mailer" out their that will run on my OS platform and isn't commercial. I would prefer a free open source solution.

Requirements:
Be able to handle multiple "mailer lists"
Generate thousands of emails a day
Stable
*Not a requirement, but it would be nice if their was a reporting feature of some sort*

Any suggestions would be appreciated.

Something like majordomo?

That would be a good question? I've taken a quick look at both majordomo and mailman and they are sort of the opposite of what I'm looking for.

All I need is the ability to send one email to thousands of receipients.

Any other suggestions?

The Sendmail Bulk_mailer addon?

qmail + ezmlm might also be worth a look.