Lotus Notes and qmail

Anyone manage Lotus Notes on their Enterprise? I'm wondering if it's possible to use the groupware features (shared calendar, etc) of Notes while maintaining qmail as the smtp and pop server... John

Off Topic - Lotus Notes x Qmail

Does anyone has already integrated Notes and Qmail on the same domain? On my work we have 2 mail servers MS-Mail and Lotus Notes and we'll migrate them both to one bigger running Qmail (after a happy experience on a branch office), but I'll do this one at a time the first will be