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A DNS failure occurred at the Send connector

 

Topic Last Modified: 2007-11-16

The Microsoft Exchange Server 2007 Management Pack for Operations Manager monitors the Windows Application log on computers that are running Exchange Server 2007 and generates this alert when the event or events specified in the following Details table are logged.

To learn more about this alert, if you are using Microsoft Operations Manager 2005, do one or more of the following:

  • From the Operator Console, select this alert, and then click the Properties tab. Review the description of the alert that includes the variables specific to your environment.
  • From the Operator Console, click the Events tab, and then double-click the event in the list for which you want to review the event description. Review the events that have been logged that meet the criteria of this Operations Manager alert.

To learn more about this alert, if you are using System Center Operations Manager 2007, do one or more of the following:

  • From the Operations Console, double-click this alert, and then click the General tab. Review the description of the alert that includes the variables specific to your environment.
  • From the Operations Console, double-click this alert, and then click the Alert Context tab. Review the events that have been logged that meet the criteria of this Operations Manager alert.

 

Product Name

Exchange

Product Version

8.0 (Exchange Server 2007)

Event ID

2000

Event Source

MSExchangeTransport

Alert Type

Warning

MOM Rule Path

Microsoft Exchange Server/Exchange 2007/Common Components/Hub Transport and Edge Transport/Transport

MOM Rule Name

A DNS failure occurred at the Send connector. See the associated diagnostic information.

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 Exchange Management 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:

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.

To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Search the Support Knowledge Base (KB) Web site.

To review Exchange 2007 event message articles that may not be represented by Exchange 2007 alerts, see the Events and Errors Message Center.

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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