On 12/23/10 3:44 AM, Götz Reinicke - IT-Koordinator wrote: > Hallo, *<:-) > > may be I'm to tired to see the solution, maybe someone can give me a hint? > > I do have a couple of servers, sending the daily logwatch report to a > central support email account. > > Some servers do have DNS A and CNAME records. On my mailserver relaying > for the servers is allowed. > > Only one server drives me crazy, getting user unknown or releaying > denied messages. > > Any idea, how to debug this issue? I'd be glad to fix this as a > christmas gift. I could provide logmessages of course. > If there is an MX record for the target address, it will go there instead of to the A record for that name. The receiving server will usually try to resolve the From: host address and reject if it can't, so the sender must have a valid hostname in your DNS (or turn off that feature). If the receiving server doesn't accept for the target domain/host address you'd get the relaying denyed error. If it does accept for the domain but does not have the user in the address you'd get the user unknown error. -- Les Mikesell lesmikesell@xxxxxxxxx _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos