Microsoft KB Archive/242961

= Exchange Server DNS Error Messages When Using Dial-Up Networking =

Article ID: 242961

Article Last Modified on 10/3/2003

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q242961



SYMPTOMS
If you use a Dial-Up Networking connection to connect to a computer running Exchange Server with DNS enabled, you may receive time-out error messages or a Non-Delivery Report (NDR).



CAUSE
This issue can occur because the use DNS feature located on the Connections tab of the Exchange Administrator Internet Mail Service properties is designed to work with full-time Internet connections.



RESOLUTION
To resolve this issue, use the Forward all messages to host feature and specify an ISP relay server.

This allows faster connections since e-mail is forwarded to a closer server and the Internet service provider (ISP) e-mail server is able to handle DNS queries that the Exchange server needs.



MORE INFORMATION
The Small Business Server Internet Connection Wizard does not allow this configuration. You can change the use DNS feature after you complete the Internet Connection Wizard.

An example of a Non-Delivery Report: Your message did not reach some or all of the intended recipients.

Subject: test Sent: 10/7/99 2:42 PM

The following recipient(s) could not be reached:

'user@unknown.com' on 10/7/99 2:42 PM           Unable to deliver the message due to a communications failure The MTS-ID of the original message is: c=US;a= ;p=Marvin;l=MARVIN01-991003384222Z-1 MSEXCH:IMS:Organization:Site:MARVIN01 3902 (000B099C) Host Unknown

Additional query words: smallbiz

Keywords: kbenv kbnetwork kbprb KB242961

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