SBS/Exchange SMTP setup

Posted on 2006-06-05
Last Modified: 2010-03-06
Hey all,
  This is my first exchange setup (SBS 2003) so I just needed to clarify a few things:

I'm using different internal and external domains, with my web site being on external domain and hosted offsite.
I have to send the IP and exchanger entries to my host to update my DNS.
I'm assuming I should send them:

IP - Server's external IP address

Do I have to send them the actual server name as the mx, or will SBS automatically route if I send that instead?

Question by:WMurray219
    LVL 3

    Accepted Solution


    One of our experts has written a usefull article on this check this out


    Author Comment

    So after changing the "Fully Qualified Domain" in Exchange to "" I can send the following to my host:

    MX -
    IP - "External IP Address"

    LVL 3

    Expert Comment

    Yes, you should be able to
    LVL 104

    Expert Comment

    What you have in Exchange and what is on your domain don't have to match. They are totally independent from each other. The information in Exchange plays no part in delivery of email to your server - the problem is with delivery of email that your users send.

    Your domain hosting company need to do two things.

    1. Create a new host of type A, pointing at your IP address. The name of the host would be mail (following your example).
    2. Create an MX record pointing to

    Remember that an MX record cannot be an IP address.


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