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 at gmail.com