Protocol Analysis warning. No DNS entries were found for this server’s authoritative domains. Open proxy detection is not available.

Details
Product: Exchange
Event ID: 200
Source: MSExchange Antispam
Version: 8.0
Symbolic Name: ProtocolAnalysisBg
Message: Protocol Analysis warning. No DNS entries were found for this server’s authoritative domains. Open proxy detection is not available.
   
Explanation

This Warning event indicates that the server could not resolve the domain for which it is authoritative in the domain records on the Domain Name System (DNS) servers it uses for name resolution. This Warning event is logged every five minutes until the server can resolve the domain in DNS.

   
User Action

No user action is required if this event is no longer logged. However, if the warning persists, follow one or more of these steps:

  • 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.

  • Try to resolve the DNS issue in your Exchange environment by following these steps:

    • Use the command prompt command pconfig to determine the DNS servers that are used by this server.

    • Make sure that the DNS server entries are correct.

    • Determine and correct the problem that removed the domain record from the domain records on the DNS server.

      Note   You may be able to resolve this issue by stopping and restarting the Netlogon service on a domain controller in the domain that uses the DNS server. Restarting the Netlogon service will update the DNS entries required by Microsoft Exchange Server and the Active Directory directory service if the forward lookup zone for the domain record exists in DNS.

  • If this event seems to cause mail flow interruptions or other problems in your Exchange environment, contact Microsoft Customer Support. For information about how to contact support, visit Microsoft Help and Support.

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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