Microsoft KB Archive/277872

= XCON: Connector Delivery Restrictions May Not Work Correctly =

Article ID: 277872

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Enterprise Edition
 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange 2000 Server Standard Edition

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This article was previously published under Q277872



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
After you configure the delivery restrictions on a connector by using Microsoft Exchange 2000 Server or Microsoft Exchange Server 2003, the restriction settings may not be applied. In Exchange 2000, the following event ID will also be generated:

Type: Warning

Event ID: 957

Source: MSExchangeTransport

Category: Routing Engine/Service

Description:

Connector restrictions (by the group or by the user) are present in the organization. However, restriction checking is disabled. Set the registry value HKLM\SYSTEM\CurrentControlSet\Services\RESvc\Parameters\CheckConnectorRestrictions to 1 (DWORD) and restart resvc and smtpsvc to enable restriction checking on local machine



CAUSE
If you need to apply a distribution list-based restriction to a connector, you must manually enable the checking process for these restrictions. Restriction checking is controlled by a registry key that must be set on the Exchange bridgehead that is the source for the connector that is being checked. If you specify a restriction, but do not create the registry key, the restriction is not checked.

Connector restriction checking is turned off by default because it can significantly affect performance to expand distribution groups and check the restrictions for each message that passes through the system. If possible, turn on this setting on where it is necessary (for example, on the bridgehead server for the restricted connector).



RESOLUTION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To resolve this issue:

 Start Registry Editor (Regedt32.exe). Locate and click the following registry key:

HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Resvc/Parameters/

 On the Edit menu, click Add Value, and then add the following registry value:

Value Name: CheckConnectorRestrictions

Data Type: REG_DWORD

Radix: Hexadecimal

Value: 1

 Quit Registry Editor. Restart the Microsoft Exchange Routing Engine service and the Simple Mail Transfer Protocol (SMTP) services for this change to take effect.</ol>

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MORE INFORMATION
This information can also be found in the Release Notes that are included with the Exchange CD-ROM.

Additional query words: smtp connector rejected restrict reject deny stop

Keywords: kbprb KB277872

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