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  • Routing outbound email with two offices

    I've got two offices connected via vpn site-to-site. All email comes into main office exchange 03 where the main office boxes are located. Email to the other office is routed to it, to an exchange server there with their mailboxes via routing group. I have outbound email in main office going straight out of it and outbound email from the branch going straight out of it.
    I now want to route the branch office email back through to the main office exchange and then out to the internet from there. Can someone give me a detailed how to on routing this outbound email back to the main and then out to the internet?

  • #2
    Re: Routing outbound email with two offices

    Exchange gurus, tar and feather me if I'm wrong here, but I believe the answer is that you need to configure your main office server as a SMART HOST.

    In System Manager, drill down to:

    <your Organization>|Administrative Groups|Servers|<your branch server>|Protocols|SMTP|<your SMTP virtual server>

    Right click <your SMTP virtual server> and choose properties

    Delivery tab

    Advanced Delivery

    Smart host: <your main office server.domain.com>

    Or at least that's the way I accomplish it at home.

    More info on smart hosts: http://support.microsoft.com/kb/821911
    VCDX3 #34, VCDX4, VCDX5, VCAP4-DCA #14, VCAP4-DCD #35, VCAP5-DCD, VCPx4, vEXPERTx4, MCSEx3, MCSAx2, MCP, CCAx2, A+
    boche.net - VMware Virtualization Evangelist
    My advice has no warranties. Follow at your own risk.

    Comment


    • #3
      Re: Routing outbound email with two offices

      I shall be blunt here. The suggestion from jasonboche above is wrong.

      If you set the smart host on the SMTP virtual server then you will stop email message flow between the servers. If you operate by the rule of NEVER putting a smart host on the SMTP server then you will not have any problems with a smart host getting in the way of message flow between multiple servers.

      Therefore the suggestion above is not the correct answer.

      You need to change the routing group configuration.
      Put both servers in to the same routing group.

      Then configure an SMTP with the server that you want email to leave set as the bridgehead.
      If you send email directly to the internet then you can leave the SMTP connector to use DNS. If you send your email through another server (ISP for example) then set the smart host there.

      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


      • #4
        Re: Routing outbound email with two offices

        Maybe I should clarify my statement: Using a Smart host is how I relay my outbound email from my Exchange server through a trusted SMTP server out on the internet.
        VCDX3 #34, VCDX4, VCDX5, VCAP4-DCA #14, VCAP4-DCD #35, VCAP5-DCD, VCPx4, vEXPERTx4, MCSEx3, MCSAx2, MCP, CCAx2, A+
        boche.net - VMware Virtualization Evangelist
        My advice has no warranties. Follow at your own risk.

        Comment


        • #5
          Re: Routing outbound email with two offices

          Originally posted by jasonboche View Post
          Maybe I should clarify my statement: Using a Smart host is how I relay my outbound email from my Exchange server through a trusted SMTP server out on the internet.
          Even that I wouldn't recommend.
          Always use an SMTP Connector. It gives you the control and it is not a hidden setting.
          I cannot think of any legitimate reason to put a smart host on the SMTP Server directly.

          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: Routing outbound email with two offices

            I use TZO mail relaying service. That's how they instructed me to configure it to use their service.

            I'll research the alternative method you're speaking of.
            VCDX3 #34, VCDX4, VCDX5, VCAP4-DCA #14, VCAP4-DCD #35, VCAP5-DCD, VCPx4, vEXPERTx4, MCSEx3, MCSAx2, MCP, CCAx2, A+
            boche.net - VMware Virtualization Evangelist
            My advice has no warranties. Follow at your own risk.

            Comment


            • #7
              Re: Routing outbound email with two offices

              I looked into setting up the two servers in one routing group, but it does not seem to allow me to do so. The main office is the master for its routing group and the branch server is the master for its routing group. I tried to delete the connectors, servers and groups, but it will not remove the server and because of this the routing group will not be removed. Was going to attempt to recreate with a single routing group. I must be missing something here. Will you lend more expertise.

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              • #8
                Re: Routing outbound email with two offices

                You cannot delete the routing group while the server is in it.
                You need to move the server in to the other main routing group. Then you can remove the routing group once it is empty.

                jasonboche - a number of the relaying services and spam filtering services give out the same advice - even after people like myself have pointed out the problems with using that method.

                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: Routing outbound email with two offices

                  Key word being move. That did it. So I created one routing group with both servers in it. Main is master. Created a SMTP connector and set Main as the Bridgehead. All email appears to being going out through the Main server now.

                  Questions though. I originally setup the two routing groups with a routing group connector between the two servers because my understanding was that this would be best for the two exchange servers to communicate through my site-to-site vpn. I guess having both servers in the same routing group does the same thing? What is the difference in terms of performance that I can expect if any? Obviously there will be more traffic on the connection now with all the branches email being set back through the vpn to the main to be routed out to the net, but what else?

                  Thanks for the help.

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