The SMTP ResetMessageStatus registry value is non-default

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2007-09-25

The Microsoft Exchange Server Analyzer Tool reads the following registry entry to determine whether default SMTP queuing configurations have been changed:


The Exchange Server Analyzer displays an error if the following conditions exist:

  • The ResetMessageStatus key is not set to 0 (zero).

  • The Cluster service is not running on the Exchange Server.

When the ResetMessageStatus registry key is set to 1, all messages currently in the queue go through all internal processing queues again when the Exchange Server is restarted. For example, all messages currently in the queue will go through the categorizer again when the Exchange Server is restarted. Therefore, the ResetMessageStatus key should be set to 1 only for troubleshooting SMTP installation issues, as documented in the Microsoft Knowledge Base article 279616, "Adding a registry key to recategorize messages" ( If you are not troubleshooting SMTP installation issues, you should delete this registry key.


This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore the registry if a problem occurs. For information about how to restore the registry, view the "Restore the Registry" Help topic in Regedit.exe or Regedt32.exe.

To delete the ResetMessageStatus registry key

  1. Open a registry editor, such as Regedit.exe or Regedt32.exe.

  2. Navigate to: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\SMTPSvc\Queuing

  3. In the right pane, locate and delete the ResetMessageStatus value.

  4. Close the registry editor.

Before you edit the registry, and for information about how to edit the registry, see Microsoft Knowledge Base article 256986, "Description of the Microsoft Windows registry" (

For more information about Exchange SMTP queuing, see the Microsoft Exchange Team Blog entry, "Explaining the Mysterious SMTP Advanced Queuing Engine" (