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SMTP addresses in Exchange 2007

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  • SMTP addresses in Exchange 2007

    Hi. I'm designing an Active Directory 2008 Parent/Child forest with Exchange 2007 and have a question about SMTP addresses.

    Parent Domain = PARENT which contains Exchange Organization PARENT. FQDN parent.xx.xx
    First Child Domain = CHILD1. Contains the main mail server for user accounts
    Second Child Domain = CHILD2. Contains most user accounts but no mail server
    Third Child Domain = CHILD3. Contains some special user accounts and a separate mail server (required by the customers in this domain)

    Most users will be in CHILD2 and have mail accounts on the mail server in CHILD1 in Organization PARENT. SMTP addresses for these accounts should be @PARENT.xx.xx

    A few users will be in CHILD3 and have mail accounts on the mail server in CHILD3 in Organization PARENT. SMTP addresses for these should be @CHILD.PARENT.xx.xx.xx

    I believe that I can do this with just the single Accepted Domain of PARENT.xx.xx and then build 2 different Email-Address Policies. One Email policy will have @PARENT.xx.xx and be assigned to users using the Company attribute value ONE. Second Email policy will have @CHILD.PARENT.xx.xx and be assigned to users in CHILD3 using the Company attribute value TWO.

    Have I correctly interpreted how this will work? I don't want to have to have multiple forests . . .but the users in CHILD3 insist on having @CHILD3 as part of their SMTP address instead of just @PARENT.

  • #2
    Re: SMTP addresses in Exchange 2007

    As far as the world is concerned sub.example.com and example.com are two different domains.
    Therefore if you are going to use sub domains then you will need to have them all listed in Accepted Domains. You will also need to have MX records for the sub.example.com zone. Email sent to user @ sub.example.com will NOT be delivered to the MX record host of example.com.

    Then as you say it comes down to email address policies. Those cross the domains, so as long as the Exchange server can read the value, you can use what you like.

    Usually I would setup three. A default which isn't touched and then specific ones for each domain. The default is the fall back policy if an error is made in the user account creation.

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
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    Sembee is a registered trademark, used here with permission.

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    • #3
      Re: SMTP addresses in Exchange 2007

      Hi Simon . . .thanks for the response. We're still working on convincing these particular users that domain.gov is fine and that they really don't want or need sub.domain.gov . . .if we're unsuccessful I'll just set up the additional mx record as you've discussed and then use the email address policies to direct the mail.

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