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  • Exchange 2003 - Change to new ISP

    OK, just change a ISP for my company. We host our own Exchange 2003.

    Already contact the domain company to change the mx, ns1 and ns2 to point to the new ip.

    So what next should i done on the Exchange server itself?

  • #2
    Re: Exchange 2003 - Change to new ISP

    Assuming you have not changed anything inside your router, nothing should be required except changing your smarthost (if you use one) to the new ISP

    If the new ISP has supplied a router, make sure ports 25 and 443 are forwarded correctly to the Exchange Server
    Tom Jones
    MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
    PhD, MSc, FIAP, MIITT
    IT Trainer / Consultant
    Ossian Ltd
    Scotland

    ** Remember to give credit where credit is due and leave reputation points where appropriate **

    Comment


    • #3
      Re: Exchange 2003 - Change to new ISP

      In the firewall, i already change everything to point to the new public ip.

      By smarthost do you mean the SMTP Outound.

      I check mine under connector, 1 entry that is SMTP Outound
      And on General Tab is select " Use DNS to route........"

      Is is correct. Because there is email queue in the ESM.

      Comment


      • #4
        Re: Exchange 2003 - Change to new ISP

        DNS routing will not use a smart host, so as long as you have internet access, things should work.

        Check your ISP is not blocking port 25 outbound -- some do for cheaper packages
        Tom Jones
        MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
        PhD, MSc, FIAP, MIITT
        IT Trainer / Consultant
        Ossian Ltd
        Scotland

        ** Remember to give credit where credit is due and leave reputation points where appropriate **

        Comment


        • #5
          Re: Exchange 2003 - Change to new ISP

          Ok thanks,

          I'll wait for the TTL to finish, because seem like the new ip still not resolve.

          Comment


          • #6
            Re: Exchange 2003 - Change to new ISP

            Hi all,

            It been 24 hours after i change to a new ISP and I check my:-
            1. mx already point to the new public ip.
            2. ns1 & ns2 point to the new host ip.

            I'm able to receive email from external (tested from 2 different external domain).

            But send email to external seem to have problem. The SMTP email still in the queue.
            I found that most of the external domain unable to SMTP but there is 2 domain able to go through and not in the ESM queue.

            Weird huhh?
            Any idea??


            what i've done
            ------------------------------
            smtpdiag [email protected] [email protected]


            Searching for Exchange external DNS settings.
            Computer name is MAIL1.
            VSI 1 has the following external DNS servers:
            There are no external DNS servers configured.

            Checking SOA fo.
            Checking external DNS servers.
            Checking internal DNS servers.
            SOA serial number match: Passed.

            Checking local domain records.
            Checking MX records using TCP: mydomain.com.my.
            Checking MX records using UDP: mydomain.com.my.
            Both TCP and UDP queries succeeded. Local DNS test passed.

            Checking remote domain records.
            Checking MX records using TCP: AAAdomain.
            Checking MX records using UDP: AAAdomain.
            Both TCP and UDP queries succeeded. Remote DNS test passed.

            Checking MX servers listed for [email protected]
            Connecting to mailhost2.VVV.VVV.VV [203.VV.VV.165] on port 25.
            Error: Expected "220". Server is not accepting connections.
            Failed to submit mail to mailhost2.VVV.VVV.VV.
            Connecting to mailhost1.VVV.VVV.VV [203.VV.VV.164] on port 25.
            Error: Expected "220". Server is not accepting connections.
            Failed to submit mail to mailhost1.VVV.VVV.VV.

            Comment


            • #7
              Re: Exchange 2003 - Change to new ISP

              Check your ISP allows you to send on port 25 -- some don't
              Tom Jones
              MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
              PhD, MSc, FIAP, MIITT
              IT Trainer / Consultant
              Ossian Ltd
              Scotland

              ** Remember to give credit where credit is due and leave reputation points where appropriate **

              Comment


              • #8
                Re: Exchange 2003 - Change to new ISP

                Thanks you for your fast reply,

                By ISP do you mean,

                1. The ONE that host my domain & ns1, ns2

                OR

                2. The provider of Internet line (ADSL line)

                Comment


                • #9
                  Re: Exchange 2003 - Change to new ISP

                  The Internet Service Provider -- who gives you the ADSL service -- they will be able to block types of traffic if they want to.
                  Tom Jones
                  MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
                  PhD, MSc, FIAP, MIITT
                  IT Trainer / Consultant
                  Ossian Ltd
                  Scotland

                  ** Remember to give credit where credit is due and leave reputation points where appropriate **

                  Comment


                  • #10
                    Re: Exchange 2003 - Change to new ISP

                    Ok i'll check with them,

                    but how do u explain the email from 2 external domain able to be sent and not queue in the ESM??

                    Comment


                    • #11
                      Re: Exchange 2003 - Change to new ISP

                      If I read your posts correctly, it is all outgoing mail which is affected, but incoming is not?
                      Tom Jones
                      MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
                      PhD, MSc, FIAP, MIITT
                      IT Trainer / Consultant
                      Ossian Ltd
                      Scotland

                      ** Remember to give credit where credit is due and leave reputation points where appropriate **

                      Comment


                      • #12
                        Re: Exchange 2003 - Change to new ISP

                        "I found that most of the external domain unable to SMTP but there is 2 domain able to go through and not in the ESM queue."

                        I'm sorry, my bad, please ignore above statement.

                        What, i'm trying to say is that outgoing email which is affected except 2 domain that the email able to go through and not queue in the ESM?


                        Any idea??

                        Comment


                        • #13
                          Re: Exchange 2003 - Change to new ISP

                          OK, so SOME outgoing mail is getting through, not all, but incoming is working correctly?

                          Have you checked to see if your new IP is blacklisted?
                          Tom Jones
                          MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
                          PhD, MSc, FIAP, MIITT
                          IT Trainer / Consultant
                          Ossian Ltd
                          Scotland

                          ** Remember to give credit where credit is due and leave reputation points where appropriate **

                          Comment


                          • #14
                            Re: Exchange 2003 - Change to new ISP

                            Hi all,

                            You are correct Ossian, and that what i thought also. Yesterday night I check on the blacklist site, my new public ip is listed. ( how came...huh)

                            After de-list, i test and seem that the outgoing email can go through (finally....).

                            Thank you so much Ossian for your prompt reply.
                            I learn so much.

                            Comment


                            • #15
                              Re: Exchange 2003 - Change to new ISP

                              No problem, glad you've sorted it all out
                              As to how, I wonder what the previous owners of your public IP were doing...
                              Tom Jones
                              MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
                              PhD, MSc, FIAP, MIITT
                              IT Trainer / Consultant
                              Ossian Ltd
                              Scotland

                              ** Remember to give credit where credit is due and leave reputation points where appropriate **

                              Comment

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