deedsmis(_at_)ris(_dot_)net wrote:
I've received these messages in two separate log files for quite some
time and I'd like to know how and where I need to go to rectify them? I
have aliases, host.conf, hosts.allow, hosts.deny, hosts.equiv in /etc
all setup to cover our network. I'm guessing, but could it be coming
from unresolved named or some other mail configurations files (yes,
newaliases was executed)?
/var/log/maillog:2546:Mar 5 15:24:02 cdm01 sendmail[508]: NAA00811:
to=procmail-request(_at_)informatik(_dot_)rwth-aachen(_dot_)de,
delay=01:54:28,
xdelay=00:00:07, mailer=esmtp,
relay=campino.informatik.rwth-aachen.de. [137.226.116.240],
stat=Deferred: 451 <postmaster(_at_)yourdomain(_dot_)com>... Sender domain
must
resolve
/var/log/messages:7041:Mar 5 16:02:21 cdm01 named[312]: Lame server
on 'yourdomain.com' (in 'yourdomain.COM'?): [207.202.14.31].53
'NS.NEON.NET'
I would imagine this isn't a procmail problem (possibly, not not likely). I
see these on my system (not the same message, but something similar) when
someone trys to get email into my system from a non-existant domain. Since
I have Sendmail doing a reverse lookup on the domain name, if that domain
name doesn't exist, the above warning results.
The above (from memory with no research) probably says that someone is
identifying themselves as being from yourdomain.com, and that the location
they came from falls under the perview of NEON.NET, which will not resolve
yourdomain.com. Thus, your mailer rejects the message because the name
lookup at NEON.NET failed to resolve yourdomain.com.