There are too many mail submission threads. The number of submission threads is currently limited to %1.

Details
Product: Exchange
Event ID: 1017
Source: MSExchange Store Driver
Version: 8.0
Symbolic Name: TooManySubmissionThreads
Message: There are too many mail submission threads. The number of submission threads is currently limited to %1.
   
Explanation

This Warning event indicates that there are too many RPC mail submission threads on this Exchange server. This warning may indicate that you should modify settings on the server. The maximum number of threads that the Microsoft Exchange Transport Service can use for submissions are as defined by the MaxConcurrentMailboxSubmissions attribute. The default is 20, multiplied by the number of processors on the server.

   
User Action

To resolve this warning, make sure that the server is not overloaded. If the server is overloaded, do one or more of the following:

  • Change the mail submissions thread value, MaxConcurrentMailboxSubmissions by using the Set-TransportServer cmdlet.

  • Consider making other changes in the Exchange environment that could decrease the load on your servers.

  • For more information about message throttling options in Exchange Server 2007, see Managing Message Throttling.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

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