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How to turn Exchange to check domain name

    Question

  • Hi,

    how to enable Exchange 2013 to check HELO message and throw error: "501 5.5.4 invalid domain name" if domain is incorrect?


    • Edited by eXPlosion_ Friday, February 9, 2018 9:42 AM
    Friday, February 9, 2018 9:41 AM

All replies

  • Set-ReceiveConnector <Receive Connector Name> -RequireEHLODomain <$true | $false>

    https://exchangepedia.com/2007/04/rfc-2821-helo-again-validating-the-heloehlo-domain.html

    Monday, February 12, 2018 12:22 AM
  • Agree with Aaron.

    By the way, if you could get any help from the above posts, please be free to mark as answer, it will be helpful for others in this forum.

    Regards,

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

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    Thursday, February 22, 2018 5:24 PM
    Moderator