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Internal / external DNS

I have a domain mydomain.com I also have an external POP3 mail server mail.mydomain.com. when I try to resolve mail.mydomain.com internally it resolves to and old external IP address. (we just switched mail carriers) Externally mail.mydomain.com resolves correctly to the new external IP. I looked in DNS and there is not any records pointing to the old IP. I looked at the HOSTS file on the server and there is no entry's.

Any place I can look to find out where this pointer to the old IP address is? Also I was going to just put in a new A Record to point mail.mydomain.com to the new IP address but I would receive this error message.

host record mail.mydomain.com can not be created node is a cname dns record.

Any Ideas?

Mandeep Khalsa

Try "ipconfig /flushdns" from the command prompt to clear the cached DNS entries on your DNS server.

David Johnson, CD

It may be set at the registrar of your domain

Corporal_K

ASKER

ipconfig /flushdns is the first thing I tried. I even rebooted the server. For a work around I added the entry's for mail.mydomain.com and www.mydomain.com to the hosts file and then it resolves to the correct IP. Problem is I do not want to edit the hosts file on all the computers. Also if I remove the hosts entry's it reverts back to the old IP address.

@David This works externally fine so can't be the registrar or I don't see how it could be???

Mandeep Khalsa

Have you checked your DNS's PTR records as well? Maybe a reversing entry there is what is causing this? And you only have 1 DNS server correct?

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Corporal_K

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Corporal_K

ASKER

There were DNS entry's