Sendmail and Domino on the same AIX box

Notes/Domino 8 Forum

Subject:

I'll start by disclaiming any skills as an AIX expert, but the following comes from my general understanding of Domino and the independence of services/daemons.

The key thing here is for sendmail and Domino not to try to listen on the same IP address and TCP port. Both will normally want to listen on port 25. Whether they use the same IP address will depend on how your AIX machine (or the LPAR that's running these services) is configured.

The simplest solution (in conceptual terms) would be to have different IP addresses for Domino and sendmail. In Domino, you may need to use the IP port restriction settings usually used for partitioned servers to tell Domino which address to use. You'll need to consult the sendmail docs to see how you configure that side of things.

An alternative would be to have your primary mail system (seems to be Domino) listen on the conventional TCP port 25, and then set the other one (sendmail) to listen on a higher port (e.g. 2525). You would need to configure both sendmail and the connecting application to use this port.

With either approach, you then have two separate mail servers that can interact or not as you decide. For example, you could configure sendmail to relay all messages to Domino, or vice versa.

One last question. Is there a particular reason why this app needs to use sendmail? Generally any message sent to a sendmail server could be routed just as easily via Domino, but if the app actually hooks into the sendmail code then you may be more restricted.

You also asked about how this set up would handle users in the local domain. I suspect your sendmail system will need to be configured just to relay mail to Domino (rather than deliver to any local users), but more info may be needed here.

Hope that helps,

Rupert Clayton
Chicago

Feedback response number WEBB7EVLCY created by ~Anita Asafreezenoopsi on 05/22/2008