Exchange Server DNS Error Messages When Using Dial-Up Networking (242961)


The information in this article applies to:

  • Microsoft Exchange Server 5.5
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
Modification Type:MajorLast Reviewed:10/3/2003
Keywords:kbenv kbnetwork kbprb KB242961
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