MSExchangeTransport 2000

This article provides an explanation and possible resolutions for a specific Exchange event. If you don't find what you’re looking for here, try searching Exchange 2010 Help.

Details

Explanation

This Warning event indicates a Domain Name System (DNS) failure occurred on the specified Send connector.

When the Send connector is set to use DNS mail exchange (MX) records to route mail automatically, the DNS client on the source server must be able to resolve public DNS records. By default, the DNS server that is configured on the source server's internal network adapter is used for name resolution. You can configure a specific DNS server to use for internal and external DNS lookups by using the Exchange Management Console to modify the DNS settings on the Exchange server properties. You can also use the Exchange Management Shell to configure the parameters in the Set-TransportServer cmdlet.

If you configure a specific DNS server on the transport server to use for external DNS lookups, you must select Use the external DNS lookup settings on the transport server on the Network Settings page of the New SMTP Send Connector wizard or, in the Shell, on the Set-TransportServer cmdlet, set the UseExternalDNSServersEnabled parameter to $True. The DnsRoutingEnabled parameter on the Send connector must also be set to $True.

For more information, see the following topics:

• Understanding Send Connectors

• Set-TransportServer

User Action

To resolve this warning, do one ore more of the following:

• Verify that DNS is configured correctly on the Exchange server and that the configured DNS servers are functional and reachable. You can use the Nslookup tool to test DNS server functionality.

• Review the Application log for related events. For example, events that occur immediately before and after this event may provide more information about the root cause of this error.

For More Information

If you are not already doing so, consider running the Exchange tools, which have been 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 and improve mail flow. 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.