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  • Mail flow issue to user's mail box

    Working on migrating from Exchange 2003 to 2010.

    Site Configuration:

    1 - 2003 Exchange Server Standard server
    2- 2010 Exchange Server Standard servers, Backend (Mailbox) / Frontend (Client/Hub)
    No Edge role
    Receive Connector on Hub has anonymous connections enabled

    Problem:

    When NAT is directed to 2010 Hub server, external e-mail does not reach the user's mail box. Internally sent e-mail is delived fine. Tracking Log Explorer shows that the server received the e-mail, but didn't deliver it (no receipient address listed). When NAT is directed back to the 2003 server, mail delivery works normally.

    What could be causing the mail to be not delivered to the user's mail box?

  • #2
    Re: Mail flow issue to user's mail box

    Could be any number of things. Depends if it is one specific user or all users.
    If all users then I would suspect the routing group connector didn't create properly and should be removed and recreated using

    remove-routinggroupconnector and new-routinggroupconnector

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
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    Sembee is a registered trademark, used here with permission.

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    • #3
      Re: Mail flow issue to user's mail box

      Thank you for your reply.

      Does that make sense though if mail is delivered normally internally, both to test accounts on the 2010 server and to production accounts on the 2003 server? When NAT is directed to the 2010 hub server, no external mail, say from gmail, will reach any account on the 2010 servers or the 2003 servers.

      To me it sounds like an issue with the receiving connector, but from the Microsoft notes that I've read so far, it seems to be configured right for a hub transport/no edge role scenario. I just don't know where to start testing/troubleshooting it where the server is receiving the e-mail, but doesn't seem to do anything with it.

      Comment


      • #4
        Re: Mail flow issue to user's mail box

        You have changed the scope of the question now.

        It wasn't clear that when email was directed at the Exchange 2010 server that no email was received by any users. Your original question made it appear that the problem was only affecting one or a small subset of users.

        Ensure that anonymous is enabled on the default Receive Connector and that you have restarted the transport service.
        I would then suggest that you do a telnet test to see if an NDR is received.

        You could also try the mail flow troubleshooter from the toolbox.

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

        Comment


        • #5
          Re: Mail flow issue to user's mail box

          I don't believe the scope has been changed, but yes, it does appear that I was a little unclear in my original statement: "external e-mail does not reach the user's mail box. Internally sent e-mail is delivered fine" with the apostrophe in the wrong place for "user's" instead of "users'". My apologies for that. However, my interpretation of the second part of that statement "Internally sent e-mail is delivered fine" should of indicated that it wasn't a routing connector issue per se. I'll try to be more specific in the future.

          Also, I did explicatively say that the "Receive Connector on Hub [transport role] has anonymous connections enabled".

          But thank you for your input. I will try the mail routing wizard again, but it only seems targeted to internal mail routing issues (which are fine), not external ones.

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          • #6
            Re: Mail flow issue to user's mail box

            I, like anyone else, can only go by what you have written.
            Your original question gives no indication that it is affecting all users. Guessing whether you mean a user or all users isn't worth it.

            My first response did suspect that it was all users.
            You need to do more diagnostics, such as a telnet test to see if Exchange accepts the email or not. Enabling Anonymous is the only thing that has to be done, if you have done other things then it may well be that you have changed something else and will need to recreate the Receive Connector for port 25.

            Simon.
            --
            Simon Butler
            Exchange MVP

            Blog: http://blog.sembee.co.uk/
            More Exchange Content: http://exchange.sembee.info/
            Exchange Resources List: http://exbpa.com/
            In the UK? Hire me: http://www.sembee.co.uk/

            Sembee is a registered trademark, used here with permission.

            Comment

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