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  • unable to send emails to a single domain

    Hi all,

    Basically we are unable to send emails to a single domain whose location is in France. I have attached 2 snapshots. First is a NDR and second is a list of details from DNs stuff.com. I have been looking on google but could not find a solution to it.

    I spoke with the other sys admins and they say that they had a talk with the Isp provider and the Isp providers say that it is nothing from their side as they have configured everthing needed including reverse dns entries

    can you please have a look at the images and advice.
    Attached Files
    Last edited by freakinup4u; 13th April 2010, 11:54. Reason: Reattached another attachment

  • #2
    Re: unable to send emails to a single domain

    Hi ,

    From your screenshot it clearly shows that the IP address listed in dnsstuff.com is not a valid IP address.

    Also please check that have you been able to send a mail to this domain from your personal GMAIL or Yahoo Mail...

    Kathy

    Comment


    • #3
      Re: unable to send emails to a single domain

      Hi kathy,

      I have reattached a diffrent attachment to the first post. please have a look at it. Indeed I can send e-mails from yahoo and gmail to problem domain.

      The message traking details are also attached.
      Attached Files
      Last edited by freakinup4u; 13th April 2010, 12:24.

      Comment


      • #4
        Re: unable to send emails to a single domain

        Originally posted by kathy View Post
        Hi ,

        From your screenshot it clearly shows that the IP address listed in dnsstuff.com is not a valid IP address.

        Also please check that have you been able to send a mail to this domain from your personal GMAIL or Yahoo Mail...

        Kathy
        No, what DNSStuff is reporting is that there is no PTR record for the ip address, which is perfectly acceptable.

        Comment


        • #5
          Re: unable to send emails to a single domain

          Can you telnet to port 25 of the receceiving server?

          Comment


          • #6
            Re: unable to send emails to a single domain

            An update to the problem. Attached is a screen shot from application log. Now i am even getting mail delay messages like delivery to xxx has been delayed. but the message is never getting delivered.
            Attached Files

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            • #7
              Re: unable to send emails to a single domain

              i tried a telnet test but got the following message attached in the screen shot. please advice.
              Attached Files

              Comment


              • #8
                Re: unable to send emails to a single domain

                There is a Cisco PIX involved somewhere.
                If it is yours, then disable FIXUP SMTP. That is well known to cause problems with SMTP delivery.

                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: unable to send emails to a single domain

                  I spoke with my Isp and had them setup the reverse dns entries. but still the problem remain. emails are not getting delivered to a single domain.

                  Comment


                  • #10
                    Re: unable to send emails to a single domain

                    What about resolving the issue with the PIX?
                    Reverse DNS isn't the magic fix. If it is one domain then it is probably something with their setup. They need to assist you with the diagnosis. If you have a Cisco PIX then you need to turn of fixup SMTP.

                    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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