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  • Mail server Design options

    Hi,

    At present we are running our exchange mailing system from location A say in Europe head office of ours.The domain name is abc.com and mx is pointed towrds the firewall and necassary firewall rules for antispam and then to mail servers.We have some 100 mailboxes running for all our users in accessing it across the globe.

    Now we have another office running for us in location B say in APAC.We have domain name xyz.com running internally.some 50 users out here access their mailbox at location A in Europe via owa and pop/smtp.

    Now requirement is to have the mailboxes of apac users at local location.
    We wanted to retain the existing mail id i.e @abc.com.

    At present we have vpn tunnel also existing between Europe and APAC though domain name are different.
    Is it possible if we can have 50 mailboxes moved to India with same existing domain.
    What are the options to achieve this?

    Thanks in advance.

  • #2
    Re: Mail server Design options

    I would consider using RPC over HTTP/s.
    Please remember to award reputation points if you have received good advice.
    I do tend to think 'outside the box' so others may not always share the same views.

    MCITP -W7,
    MCSA+Messaging, CCENT, ICND2 slowly getting around to.

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    • #3
      Re: Mail server Design options

      I would concur -- 50 users does not (IMHO) warrant a separate Exchange server which will only speed up messages within the APAC office and delivery to internet.

      Incoming mail would still go INTERNET->EUR->APAC (over VPN)
      Inter office mail would go APAC<->EUR (over VPN)
      Outgoing mail would go APAC->INTERNET

      A good implementation of RPC/HTTPS, with cached mailboxes locally, would be a lot cheaper and easier.
      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 **

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      • #4
        Re: Mail server Design options

        Thanks a ton for your expert opinion.

        Is there any possibility if I can have exchange locally using same domain name @abc.com specifically for APAC users?

        Somehow due to some compliance reasons we required to have our own mail server at APAC Location too?

        What if at APAC we create child domain of EUR domain and create exhange setup at APAC here and as VPN/MPLS is there among two offices.So incoming mail will always hit EUR first as MX is pointed there and can route among mail servers over vpn.
        In this case we can have redundancy of mailboxes for EUR and APAC as well.

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        • #5
          Re: Mail server Design options

          OK, compliance changes everything.

          As long as APAC is in the same AD forest as EUR, you can have connected exchange servers -- mail flow will be as you outline above.

          You could (with Exchange 2010) create a "cross site DAG" so mailbox databases would be duplicated, but only one copy would be live. You could also change MX record priority so if EUR is offline, delivery will be to APAC. The CAS role would need consideration as you cannot (IIRC) have a multi-site CAS array, so in the event of a failure, clients would need to be reconfigured.

          Under the circumstances, a small expenditure on some consultancy might save you money in the long run.
          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 **

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          • #6
            Re: Mail server Design options

            You could do a DAG with multiple mailbox stores (One per geographic site) so that the live mailbox store is local by default but you have some redundancy. The CAS role can be integrated with the mailbox role in smaller sites IIRC.
            BSc, MCSA: Server 2008, MCSE, MCSA: Messaging, MCTS
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            Cruachan's Blog

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