Ok dont blast me, because of my noobishness.
I have a RH9 Server running as my web/email server
Running
qmail
vpopmail
My domain expired, unknown to me
( I wasn't the person
managing it). Needless to say I got it restored,
and everything seemed ok, until I had complaints
of some users were not getting all there mail.
I checked into it and the senders are getting this error:
Router: Failed to connect to SMTP host [domain].com
because : The server is not responding. The server may be down or you may be experiencing network problems. Contact your system administrator if this problem persists.
its been a month since I restored the domain.
more than long enough for DNS propagation.
I am trying to eliminate my server as possible cause.
What to look for?