Outbound Mail Service Error: "The smpt server requires a secure connection or the client was not authenticated. The server response was 5.7.1 Client was not authenticated"

Version 5

    Verified Product Versions

    Service Desk 7.7.xService Desk 7.8.xService Desk 2016.xAsset Manager 2016.xAsset Manager 2017.xService Desk 2017.x

    Problem

     

    You are getting the error message below in your Application Event log for your Outbound Mail Service:

     

    The smtp server requires a secure connection or the client was not authenticated. The server response was 5.7.1 Client was not authenticated

     

    Solution

     

    This means that the user account used in the "Outlook Mail Server Settings" isn't authenticated, and therefore will not have proper permissions to process emails.

     

    Check the user account specified within your "Outlook Mail Server settings."

     

    outbouns mail settings.jpg

     

     

    Your Exchange Server Administrator should be able to help you solve this issue by adding the right permissions to the relevant user account.