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Just FYI, MX records are published for whole domain, on the other hand we can also publish MX records for child domains too. But try with external domain as of now and check if you can see MX records.
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Just FYI, MX records are published for whole domain, on the other hand we can also publish MX records for child domains too. But try with external domain as of now and check if you can see MX records.

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aahhh!!!! &nbsp; goofed.<br />
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Thanks Will.
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When I use MXTOOLBOX to check MX LOOKUP against our mail server, we get back......<br />
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mx:mail.ourserver.com &nbsp; Find Problems &nbsp; &nbsp;mx &nbsp;<br />
No Records Exist<br />
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We have the external DNS configured and if I do NSLOOKUP it translate correctly. Not sure what's not finished.
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When I use MXTOOLBOX to check MX LOOKUP against our mail server, we get back......

mx:mail.ourserver.com   Find Problems    mx  
No Records Exist

We have the external DNS configured and if I do NSLOOKUP it translate correctly. Not sure what's not finished.

Mail server MX lookup comes back, No Records Exist.

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.