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Q242961: Exchange Server DNS Error Messages When Using Dial-Up Networking

Article: Q242961
Product(s): Microsoft Exchange
Version(s): winnt:5.5
Operating System(s): 
Keyword(s): kbenv kbnetwork
Last Modified: 09-DEC-1999

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The information in this article applies to:

- Microsoft Exchange Server, version 5.5 
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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

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Keywords          : kbenv kbnetwork 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbprb

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