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Yes it was my spam server still containing our old DNS entry thanks, 
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Yes it was my spam server still containing our old DNS entry thanks,

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Hi,<br />
<br />
My domain controller die.. had to use a secondary domain controller with a secondary dns.. now this secondary is the main DNS server.. Exchange 2007 sends and receives internal e-mail But, cant receive any external e-mail... I can send out.. &nbsp; What am I missing?.. <br />
Thanks, 
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Hi,

My domain controller die.. had to use a secondary domain controller with a secondary dns.. now this secondary is the main DNS server.. Exchange 2007 sends and receives internal e-mail But, cant receive any external e-mail... I can send out..   What am I missing?.. 
Thanks, 

Cant receive external e-mail - have a new dns server

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.

Email Servers

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.

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.