Hello Everyone,
I searched through the archive on this and it seems to be a subject that
has been beat pretty well so I will get to the point. I know the
problem is with dns but with who's is a good question and why it is
sporadic.
I have noticed in my logs that the same virtual domain gets the error
"Sender_domain_must_resolve" from the same 3 mail servers quite often
though the mail eventually does go through after as many as 100 retries.
delivery 70: deferral:
Connected_to_204.210.223.23_but_sender_was_rejected./Remote_host_said:_451_<[EMAIL PROTECTED]>..._Sender_domain_must_resolve/
That ip address according to ARIN is Timewarner Cable cable modem
service
The other two ip's that is always having this error is:
207.180.206.1 which ARIN reports is North Coast Web
216.196.0.17 which is my isp's mail server. I host the domains on my
servers and they only have a reverse.
I have a couple friends on warners cable service and send mail to them
quite often and never get this error when sending them mail but this
virtual domain always seems to get the error.
This virtual domain is setup to use my MX in dns. If I use nslookup on
the above ip's, my isp can do a look up of lsbsolutions.com with no
problem. North Coast web can only look up my domain (teoi.net) and one
other virtual domain on my box but not any other (which are on the same
box using the same DNS) but it could do reverses on all of my virtual
domains. Timewarner couldn't even look up names in it's own domain so I
wrote them off (I am not surprised, but that is a story for another
day).
Is this my problem or their problem? Some days it is fine and others it
is not. I hope it is not my isp's because getting in touch with them is
like getting my dog to balance my check book though they are a good isp
(little down time and decent backbone connections) you just don't want
to try to e-mail or call them.
Thanks!
--
Dale Miracle
System Administrator
Teoi Virtual Web Hosting
