Microsoft KB Archive/262270

= Outbound IMS Mail Backing Up Due to Incorrect TCP/IP LAN Settings =

Article ID: 262270

Article Last Modified on 10/12/2007

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APPLIES TO


 * Microsoft Exchange Server 5.5 Service Pack 3
 * Microsoft Windows 2000 Standard Edition

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This article was previously published under Q262270



SYMPTOMS
When you forward Internet mail by using the Exchange Server 5.5 Internet Mail Service and the Domain Name System (DNS), you may notice e-mail backing up in the Internet Mail Service outbound queues.



CAUSE
The outbound mail queues may be backing up due to a DNS configuration error.



RESOLUTION
To test whether DNS is set up properly, do one of the following:
 * Click Forward all messages to host on the Connections tab of the Internet Mail Service. Set this to the IP address of your Internet service provider's (ISP's) mail server. If outbound mail flow is restored when you do this, then the Internet Mail Service is having problems resolving names using DNS.
 * Run the IMC DNS Resolver utility that is located on the Exchange Server CD to verify if DNS is the issue.



MORE INFORMATION
For additional information about how to properly configure DNS, click the article numbers below to view the articles in the Microsoft Knowledge Base:

146556 XFOR: Method Used by IMS to Obtain IP Address

203204 How to Obtain MX Records with the Nslookup.exe Utility

Keywords: kbprb KB262270

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