Receive connector %1 requires Transport Layer Security (TLS) before the MailFrom command can be run, but the server can’t achieve it. Check the authentication settings of this connector.

Details
Product: Exchange
Event ID: 1032
Source: MSExchangeTransport
Version: 8.0
Symbolic Name: SmtpReceiveTLSRequiredFailed
Message: Receive connector %1 requires Transport Layer Security (TLS) before the MailFrom command can be run, but the server can’t achieve it. Check the authentication settings of this connector.
   
Explanation

This Error event indicates the specified Receive connector must use Transport Layer Security (TLS) for all messages that are accepted by the connector. However, the Receive connector is not configured to accept TLS authentication.

A Receive connector requires TLS for all incoming when the RequireTLS parameter on the Set-ReceiveConnector cmdlet in the Exchange Management Shell is set to the value $true. The default value is $false.

If the Receive connector is configured to accept TLS, an SMTP connection to the Microsoft Exchange Server 2007 Hub Transport server or Edge Transport server that uses the specified Receive connector will display 250-STARTTLS in the response to the EHLO command. If the SMTP connection to the Hub Transport server or Edge Transport that uses the specified Receive connector does not display 250-STARTTLS in the response to the EHLO command, the Receive connector is not configured to accept TLS authentication.

   
User Action

To correct this error, do one of the following:

  • Configure the specified Receive connector to accept TLS authentication. The AuthMechanism parameter of the Receive connector must contain the value TLS.

    You can verify that the Receive connector accepts TLS by using Telnet on port 25 to connect to the Hub Transport server or Edge Transport server that contains the Receive connector, and observing 250-STARTTLS in the response to the EHLO command.

  • Configure the specified Receive connector not to require TLS by setting the RequireTLS parameter on the Set-ReceiveConnector cmdlet in the Exchange Management Shell to the value $false.

For more information, see the following topics:

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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