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  • Problem with some incoming mails

    Hello everybody,

    I have installed Exchange 2007 on a new server (without edge role). We have been blacklisted. Now, we are finally clean, but we still don't get mails from, by example, hotmail. We receive mails from other providers, but not from all. I don't know why. I still don't have any filter. My domain is www.ordi.com (address [email protected]), and Ip is 87.66.14.135.
    Why I try a telnet from my home, it works, but from a friend, that doesn't work...
    My hair are all getting white...

    Thank you very much for your help.

  • #2
    Re: Problem with some incoming mails

    You are not listed on any of the major blacklists.
    http://www.robtex.com/rbl/87.66.14.135.html

    Even if you were, that would not affect your ability to receive email, just send.

    Your server is also responding to the world using some of the online tools.

    The telnet test could fail from some home ISPs because of blocks on 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.

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    • #3
      Re: Problem with some incoming mails

      Originally posted by Anthony2 View Post
      Hello everybody,

      I have installed Exchange 2007 on a new server (without edge role). We have been blacklisted. Now, we are finally clean, but we still don't get mails from, by example, hotmail. We receive mails from other providers, but not from all. I don't know why. I still don't have any filter. My domain is www.ordi.com (address [email protected]), and Ip is 87.66.14.135.
      Why I try a telnet from my home, it works, but from a friend, that doesn't work...
      My hair are all getting white...

      Thank you very much for your help.
      "Why I try a telnet from my home, it works, but from a friend, that doesn't work..."
      Have you configured the SMTP connection tab? Or a firewall for that matter.
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      • #4
        Re: Problem with some incoming mails

        You might also want to investigate your reverse dns... when I ran a reverse query against your IP address I got

        "Answer:
        87.66.14.135 PTR record: 135.14-66-87.adsl-static.isp.belgacom.be. [TTL 43200s] [A=87.66.14.135]"

        Some ISP's are using the reverse lookup to see if it matches your mx record to fight against abuse and SPAM... I know I had this issue with AOL.

        Give your ISP a call and have them change their record from 135.14-66-87.adsl-bla bla bla to your mail.ordi.com

        I think this will solve your issue.

        Comment


        • #5
          Re: Problem with some incoming mails

          Reverse DNS would have nothing to do with the server's ability to receive email, only its ability to send email. While the reverse DNS record needs to be corrected, it will not be the reason why email isn't received.

          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


          • #6
            Re: Problem with some incoming mails

            Thank you for your help.
            I have already phoned my ISP, they told me they didn't block anything...
            I think I have a problem with secure connexion, I am still looking for. In the event viewer, I have problem with ID 12014. I don't know if it's linked, but I also have to solve this problem.

            I didn't touch my firewall because with my old server, that worked very well.

            Happy New Year to Everybody.

            Comment


            • #7
              Re: Problem with some incoming mails

              Simon:
              My statement about reverse DNS is based on a situation that I ran into myself with when, because I didn't have the same reverse name matching my sending host record, that AOL blacklisted from sending me email. I was getting mail from other ISP's but not from AOL... This was finally resolved when I changed my reverse DNS record to match my host record.

              I'm basing this upon that he does get email from some carriers
              "but we still don't get mails from, by example, hotmail. We receive mails from other providers, but not from all."

              Yes sending mail might have caused it, but not receiving mail might be the result...

              Anthony, I know your last statement was that you checked with your ISP and they said they were not blocking anything... If mail from hotmail.com is a consistant problem, have you called and had your ISP track the message coming across through their network to at least you network (have they actually seen the message come through them)?

              Comment


              • #8
                Re: Problem with some incoming mails

                I have been working with Exchange and email for many years and I have never known email to fail on reverse DNS problems. If you look through other forums and sites I would doubt very much you will find anyone else using that as a value to fail to deliver email. ISPs do not want to hold on to email, they want to get it out, off their systems.
                I personally think that was a coincidence and something else you did resolved the problem at around the same time.

                As the recipient diagnosis is quite difficult unless someone can prove that the connection is being made to your server and what the rejection is. Until they do that the problem could be elsewhere.

                As for the statement from your ISP, when you have been working in this industry as long as I have, you will realise that ISP Tech Support lie through their teeth at every opportunity. They may not do it on purpose, but it is highly unlikely that the person who has answered the phone will even have access to the logs to see if something has been blocked, let alone know for sure.

                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: Problem with some incoming mails

                  What had happened with AOL is if you read their RBL/SPAM documentation, that they do not allow IP numbers hen they do a reverse DNS check for SPAM. Since there were numbers in the reverse listing initially that were the ISP's (ie... 12-87-157-56.adsl.bellsouth.net, and trust me I went round and round with them stating that the above, although having numbers in the name was technically not an IP address since it wasn't 12.87.157.56 (this being a made up number) but talking to 3 different engineers on 3 different days, they all said the same thing that their software looks at those fields as dotted numbers). When I had Bell change that name to my mail.domain.com, I was fixed (after it propogated of course).

                  Comment


                  • #10
                    Re: Problem with some incoming mails

                    That is a common check. The number format that you have identified looks like a generic or dynamic IP address. Therefore it is easy for AOL to block email from those addresses. When you get it changed to a specific address (host.domain.com) it shows that someone is actually in control of the IP address and it can be traced.
                    An address in that format would certainly stop you from sending email to AOL, but I have not heard of it stopping you from receiving email from AOL.

                    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


                    • #11
                      Re: Problem with some incoming mails

                      Well, when I all of a sudden stopped receiving mail from AOL and was getting mail from everyone else, that's what AOL told me and when I changed it (Reverse DNS record) to what they had told me, I started getting AOL mail... Maybe it was coincidence, just know it worked for me.

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