Microsoft KB Archive/146165

= XFOR: No Error When IMC Starts and Configured for DNS =

Article ID: 146165

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition

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This article was previously published under Q146165



SYMPTOMS
If the Internet Mail Connector (IMC) is configured to use a Domain Name Service (DNS) and there is no resolver, the IMC starts without logging an error in the event log.



RESOLUTION
If the DNS is not available, there are other ways to resolve the address:
 * The Internet Mail Connector will use the DNS.


 * If there is no DNS, the Internet Mail Connector will read the local Hosts file.


 * If the local Hosts file does not contain the address, the Internet Mail Connector uses the WINS service to resolve the address. If WINS doesn't return an answer to the query, a non-delivery report (NDR) will be sent back to the sender of the message.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 4.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.



MORE INFORMATION
DNS is the method by which an e-mail address is resolved to the TCP/IP address of a host that can relay the message to the correct user.

