Here is my problem, I have sendmail configured with antispam software, etc on my server. I also have Lotus Domino for groupware/mail/etc. on the same machine, with the lotus smtp task listening on port 26 (since sendmail has 25).

How do I configure sendmail to deliver all incoming mail to localhost:26?

I have found a couple of howtos on the net but they all describe how to forward to another host and another port, and I just want to forward to another port, on the same host (localhost).

When I tried to do what they recommended I got the error "Mx problem, mail loops back....."

just configure the lotus thing to listen on 25 .

What is wrong with that?
(of course shutoff sendmail)

whell, I want sendmail to act as incoming relay since I have configured MailScanner, Spamassassin with sendmail. I don´t rely on lotus antispam / antirelay protection, so there is why I want sendmail to take care of everything first.