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Change Exchange address IPv6 in IPv4 in the SMTP header

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  • Change Exchange address IPv6 in IPv4 in the SMTP header

    Hello,

    I already disabled the IPv6 protocol on the network interfaces on my Exchange 2007 server.
    In the SMTP headers I see of outgoing messages Exchange server's IP that is still in IPV6 format:
    ------------------
    Received: from MAILBOXSRV.AGARIK.MUT ([fe80::7591:a37:50f3:25a5]) by cas-hub.AGARIK.MUT ([2002:d9ae:d097::d9ae:d097]) with mapi; Tue, 19 Jan 2010 10:26:26 +0100
    ------------------
    I want the IPs are in IPv4 that appear in the SMTP headers of outgoing messages.
    Do I have to disable the IPv6 protocol to solve this problem ([HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip6\Parameters]
    Disabledcomponents =dword:0xFF (DWORD)) or is there another parameter to modify?

    Best regards,
    David BUISSON

  • #2
    Re: Change Exchange address IPv6 in IPv4 in the SMTP header

    Not possible as far as I am aware. The headers for the internal transfer is completely out of your control.

    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


    • #3
      Re: Change Exchange address IPv6 in IPv4 in the SMTP header

      I have a other Exchange server 2007 and I have not this IPV6 problem with the smtp headers of outgoing messages.
      The IPs addresses in the smtp header of the other Exchange server are in Ipv4 format .

      Could you tell me why this difference between these Exchange servers?

      Best regards,
      David BUISSON

      Comment


      • #4
        Re: Change Exchange address IPv6 in IPv4 in the SMTP header

        Originally posted by davidbuisson View Post
        Could you tell me why this difference between these Exchange servers?
        Impossible to say. Difference in the host OS is about the only thing that I can think of that could cause the difference.

        Why is it such a concern for you? It is an internal setting that has NO OPERATIONAL effect. It makes no difference to how email is handled by either internal or external systems. It is one of those things that I would simply ignore.

        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: Change Exchange address IPv6 in IPv4 in the SMTP header

          Is your mailbox server clustered based on Windows 2008?

          Comment


          • #6
            Re: Change Exchange address IPv6 in IPv4 in the SMTP header

            Hello,

            Yes my mailbox server clustered is based on Windows 2008.

            It is a problem for me because I would use one antispam gateway (Forefront/Frontbridge) for the outgoing messages, but this gateway doesn't allow the IPv6, IPv4 only.

            Best regards,
            David BUISSON

            Comment


            • #7
              Re: Change Exchange address IPv6 in IPv4 in the SMTP header

              I had a customer with a similar problem, but don't had the time to investigate more, but digging a little bit with google I found the following. Maybe it helps for your problem as well:
              http://social.technet.microsoft.com/...8-3a53606291d1

              Comment


              • #8
                Re: Change Exchange address IPv6 in IPv4 in the SMTP header

                Originally posted by davidbuisson View Post
                It is a problem for me because I would use one antispam gateway (Forefront/Frontbridge) for the outgoing messages, but this gateway doesn't allow the IPv6, IPv4 only.
                And what does Microsoft support have to say?

                Given that you are using two Microsoft products I find it highly unlikely that one of their products will reject something generated by default from a second product. While this is Microsoft, the solution is sold as package. It is the first i have heard of this being a problem, and Forefront is a widely used product.

                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


                • #9
                  Re: Change Exchange address IPv6 in IPv4 in the SMTP header

                  Hello,

                  Forefront/Frontbridge say they don't support IPv6 IP address formats in their Admin Center. While this may be addressed in a future release, there is currently no way to accommodate an IPv6 IP address.

                  Best regards,
                  David BUISSON

                  Comment


                  • #10
                    Re: Change Exchange address IPv6 in IPv4 in the SMTP header

                    Not supporting IPv6 traffic is to be expected. IPv6 support is lacking right across the Internet.

                    However IPv6 traffic in the headers shouldn't matter. The headers are just a trail of what has already happened.

                    I have just checked headers on an email that is coming out of Microsoft themselves.. IPv6 all over them and they are routed via bigfish.com, which is one of Forefront hosted services domains.

                    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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