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XCON: Connector Delivery Restrictions May Not Work Correctly

This article was previously published under Q277872
This article has been archived. It is offered "as is" and will no longer be updated.

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

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.
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).
To resolve this problem set the registry value CheckConnectorRestrictions to 1 (DWORD) and restart resvc and smtpsvc to enable restriction checking on local machine. To have us set the CheckConnectorRestrictions value for you, go to the "Fix it for me" section. To fix this problem yourself, go to the "Let me fix it myself" section.

Fix it for me

To verify and fix the registry settings automatically, click the Fix this problem link. Click Run in the File Download dialog box, and follow the steps in this wizard.

Note this wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.

Let me fix it myself

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows

To resolve this issue yourself:
  1. Start Registry Editor (Regedt32.exe).
  2. Locate and click the following registry key:
  3. 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
  4. Quit Registry Editor.
  5. Restart the Microsoft Exchange Routing Engine service and the Simple Mail Transfer Protocol (SMTP) services for this change to take effect.
More information
This information can also be found in the Release Notes that are included with the Exchange CD-ROM.
smtp connector rejected restrict reject deny stop fixit fix it

Article ID: 277872 - Last Review: 12/05/2015 22:28:08 - Revision: 6.0

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

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