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.