Microsoft KB Archive/323669

= XFOR: &quot;550 5.7.1 Unable to Relay&quot; Error Message When E-mail Is Sent to Local Exchange Recipient =

PSS ID Number: 323669

Article Last Modified on 6/13/2003

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The information in this article applies to:


 * Microsoft Exchange 2000 Server

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This article was previously published under Q323669



IMPORTANT: This article contains information about editing the metabase. Before you edit the metabase, verify that you have a backup copy that you can restore if a problem occurs. For information about how to do this, see the &quot;Configuration Backup/Restore&quot; Help topic in Microsoft Management Console (MMC).



SYMPTOMS
When an e-mail message is sent to a local recipient in your Exchange 2000 server, the sender may receive an e-mail that contains the following error message

550 5.7.1 Unable to relay for.

where  is the local recipient's Exchange SMTP address.



RESOLUTION
To resolve this problem, edit the Microsoft Internet Information Services (IIS) metabase, and then restart the administrative services.

Edit the Metabase
WARNING: If you edit the metabase incorrectly, you can cause serious problems that may require you to reinstall any product that uses the metabase. Microsoft cannot guarantee that problems that result if you incorrectly edit the metabase can be solved. Edit the metabase at your own risk.

NOTE: Always back up the metabase before you edit it.

 Click Start, point to Programs, point to Administrative Tools, and then click Services. Right-click Microsoft Exchange System Attendant, and then click Stop. Click Yes to stop the other services. Click Start, point to Programs, point to Administrative Tools, and then click MetaEdit 2.2.For additional information about how to install MetaEdit, click the article number below to view the article in the Microsoft Knowledge Base:

232068 HOW TO: Download, Install, and Remove the IIS MetaEdit 2.2 Utility

 Locate the following subkey in the metabase:

LM\DS2MB

 On the File menu, click Export text file, and then click Yes.</li> Type a name for the file, click Save, and then click Yes in the confirmation dialog box.</li> Click OK.</li> Right-click the LM\DS2MB subkey, click Delete, and then click Yes to confirm the deletion.</li> Quit MetaEdit.</li></ol>

Restart Administrative Services
<ol> Click Start, point to Programs, point to Administrative Tools, and then click Services.</li> Right-click IIS Admin Service, and then click Restart.</li> Click Yes.</li> Right-click Microsoft Exchange System Attendant, and then click Start.</li> Right-click Microsoft Exchange MTA Stacks, and then click Start.</li> Right-click Microsoft Exchange Information Store, and then click Start.</li> Send an e-mail message to a local recipient to test the settings.For additional information about how to test SMTP services, click the article number below to view the article in the Microsoft Knowledge Base:

286421 HOW TO: Test Windows 2000 IIS SMTP Services Manually

</li></ol>

Keywords: kberrmsg kbprb KB323669

Technology: kbExchange2000Search kbExchange2000Serv kbExchange2000ServSearch kbExchangeSearch

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