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How to trace a private IP address to its mail server.

Posted on 2005-04-29
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Last Modified: 2011-10-03
Dear Experts,
2 part question. I am trying to assist a poetential client of ours with his email. I used a DNS query to try and find his MX records. I typed in his domain name and his name server. Nothing comes up. The strange part is, he is using email addresses with name@domainname.com but his in going and out going is a private IP address. My problem is that i cannot find where his MX records are sitting? I am also mystified on how he is even able to use his email? Although, he does complain of sending an email out and getting a response "unknown host" but an hour later resending the same email and it goes through...Unfortunately my client has no idea either.
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Question by:piratepatrol
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tabush earned 2000 total points
ID: 13897775
It sounds like you are running your DNS query from within the client's network, and also that his network already has a domain which is the same as his internet domain name. let's assume his domain name is company.com - his AD is probably also company.com.

Ideally, in a situation like that, he should manually build a DNS record on his internal DNS server for his domain.
To properly do the MX lookup, try www.dnsstuff.com - use the box on the top of the right-side column.

Overall, it sounds like the DNS server was never set up properly. But it is a small problem which should be easily correctable.
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