Topic Last Modified: 2010-08-16

The Microsoft Exchange Server 2010 Management Pack for System Center Operations Manager monitors the Windows Application log on computers running Exchange 2010 and generates this alert when the events specified in the following Details table are logged.

To learn more about this alert, in Operations Manager, do one or more of the following:


Product Name


Product Version

14.0 (Exchange 2010)

Event ID


Event Source


Alert Type


Rule Path

Microsoft Exchange Server/Exchange 2010/Common Components/Hub Transport and Edge Transport/Transport

Rule Name

The SMTP connector rejected an incoming connection because the maximum number of connections for this connector has been reached.


This Warning event indicates that a Receive connector has reached the maximum permitted number of simultaneous incoming connections. This value is specified by the MaxInboundConnection parameter on the Receive connector. The default value is 5000.

User Action

To resolve this error, increase the value of the MaxInboundConnection parameter on the Receive connector by using the Set-ReceiveConnector cmdlet in the Exchange Management Shell. The valid input range for this parameter is 1 to 2147483647. To disable the inbound connection limit on a Receive connector, enter a value of unlimited.

For more information, see Set-ReceiveConnector.

For More Information

If you are not already doing so, consider running the Exchange tools created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.