|Message:||A message from domain-secured domain ‘%1’ on connector ‘%2’ could not be authenticated because the server did not use Transport Layer Security (TLS). Contact the administrator for %1 to resolve the problem, or remove the domain from the domain-secured list.|
This Error event indicates that a domain that is specified in the TransportConfig object as a domain-secured domain has sent a message that did not use Transport Layer Security (TLS).
To resolve this error, you must perform one of the following tasks:
Disabling Domain Security
To disable Domain Security for the remote domain, you must remove the domain name from the TLSReceiveDomainSecureList parameter in the Set-TransportConfig cmdlet. If you have not configured dedicated Receive connectors for the domain, you can disable Domain Security for that domain by removing the domain name from the TransportConfig object.
If you are using dedicated Send connectors and Receive connectors for the domain-secured mail flow path, disable the connectors by setting the Enable parameter to $False on both the Set-ReceiveConnector cmdlet and the Set-SendConnector cmdlet. Mail flow from this particular domain will then flow through your default Send connectors and Receive connectors.
For more information, see the following topics in Microsoft Exchange Server 2007 Help:
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.