Problems sending mail to certain domains.

[djbeenie]

Hello everyone. It seems that I am having problems sending mail through my exchange server to certain domains.

I can send all email eternally.

I can send mail to hotmail.com, yahoo.com

But when I am trying to send mail to (exp) southstar.com, I get no response. It’s like the mail just disappears. I can however receive mail from southstar.com. Anyone have any clue? Possibly a DNS issue?

On my virtual SMPT server, I have went to delivery, advanced, and configured DNS there. I have entered my local DNS and my isp's DNS there.

192.168.0.5
209.126.12.4
68.191.247.254
66.190.172.252

I know I am close on the trial. Can anyone point me in the correct direction?

Regards,
Bryan


dj beenie

http://www.eternal-rhythms.com

 

[djbeenie]

sorry bump ^

dj beenie

http://www.eternal-rhythms.com

 

[MoobyCow]

Unfortunatly I've had this problem as well. I never did figure out what was wrong, but I was able to work around it by putting the mx records for the domain I could not send to on my DNS server.

For whatever reason certain domains with multiple MX records with the lower priority server (first option) not working caused email to fail.

Look up MX records and fail and you might find the original thread for a better explanation, I'd do it myself but I just realized I have to get going to work now.

 

[Chambers]

Don't add any DNS servers in the Virtual SMTP properties, just make sure the MAIL server's DNS is correct in the network properties. Also, can you ping these domains from your mail server? Are you getting a response back? If so, try telnet 'domain name' 25 to see if you even connect to their mail server. If it disconnects right away you may be on a blacklist and once you connect to them they see you as being on a blacklist and the server will disconnect right away.

 

[djbeenie]

I will try that, thank you. But if I was blocked, wouldn't I get a response back saying I was blocked? Rather than getting no response at all?

Regards,
Bryan

dj beenie

http://www.eternal-rhythms.com

 

[djbeenie]

Yeah that must be the problem.

telnet southstar.com 25
Connecting To southstar.com...Could not open connection to the host, on port 25:
Connect failed


I will have the the admin look at it tommorrow. Thanks for the help!

dj beenie

http://www.eternal-rhythms.com

 

[Chambers]

If you were blocked you have a good chance of getting a NDR, however some places have it set up that it will just disconnect with no NDR (Such as my servers). If they see you on a RBL list my server will just disconnect and be done with it.

Make sure that domain has their DNS set up correctly along with your own DNS server

 

[joepc]

Do you have a pointer record? Some people use reverse dns lookup in order to accept mail.

 

[djbeenie]

Problem solved. Was on the the blacklist.

Thanks for all the help!

Regards,
Bryan

dj beenie

http://www.eternal-rhythms.com