On Sat, 2003-08-23 at 13:49, Vidol Loeung wrote: > I tried to stop the mail service on mail1.mydomain.com, expecting that > from then on, whenever there is mail for the domain, mail2.mydomain.com > should be the one to receive and queue that mail. Yes, it actually did; > however, I got the error 553 (system config error): "mail loops back to > me (MX problem)". > > Both my mail servers mail1 and mail2 run Sendmail in RH9.0 and they both > point to ns.mydomain.com as their DNS server, which runs BIND also in > RH9.0. > > Please, you have any clues to the problem? I'm glad you are only asking for clues. :-) I believe this is not really a DNS problem but a sendmail configuration issue. It sounds as if when mail2 gets the mail for mydomain.com it determines that it can't deliver locally so it tries to send it out. The normal process is that it does an MX lookup to find responsible systems. It learns that it is a responsible system for delivery but it can't deliver. Thus, the loop. I haven't used sendmail in a looonnnggg time. But, there should be a way to configure that for a given domain, mydomain.com in your case, to circumvent the MX lookup and deliver to a given host. For you, that would mean mail1. Sorry for the vague response...but sendmail is not my MTA. Ed -- Shrike-list mailing list Shrike-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/shrike-list
