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mail flow issue RRS feed

  • Question

  • Dear Team,

    I have smtp email id configure in application i.e "Noreply@Domain .com" when ever user is sending mail via Exchange server to External users mail doesn't get delivered and give error message "5.7.54 SMTP; Unable to relay recipient in non-accepted domain". And if he sends mail Distribution group mail doesn't get dilevered neither we get any bounce back message.


    • Edited by Raritan Tuesday, August 13, 2019 3:28 PM error message
    Tuesday, August 13, 2019 3:27 PM

All replies

  • Check your connectors - Allow mail relay to external address with powershell - but NOT for all IP‘s. You don‘t want to use an open relay (for everyone). Check this: https://practical365.com/exchange-server/exchange-2016-smtp-relay-connector
    • Edited by Guru_Doc Tuesday, August 13, 2019 5:30 PM
    Tuesday, August 13, 2019 5:18 PM
  • Hi,

    Agree with Guru_Doc, you can create an anonymous SMTP relay connector for specific IP addresses. Here is an article about creating and configuring a receive connector for anonymous relay, you may get some useful information from it: Allow anonymous relay on Exchange servers

    Regards,

    Lydia Zhou


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

    Wednesday, August 14, 2019 2:41 AM
  • Hi,

    Just checking in to see if above information was helpful. Please let us know if you would like further assistance. 

    Regards,

    Lydia Zhou


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

    Monday, August 19, 2019 9:25 AM