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add other domain to Exchange 2007

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  • add other domain to Exchange 2007

    Hello everyone ,

    I have a problem with some settings of Exchange 2007.
    I will first introduce our network and my problem.

    Our infrastructure:

    OS win srv std 2008 , Exchange 2007 , one domain installed up and running for long time named for exemaple
    All people at this organization have email adress like this [email protected]

    Now , we bought a new domain and we want some of our empolyers to have both adress emails : [email protected] and [email protected]

    What i want is :

    1. The users that have now 2 email adresses to have same inbox (if possibil)
    2. When using outlook 2007/2010 the user to activate the From option ,
    and when send email to have option to select FROM what email he sends.

    I read this article and do the settings from there..also the MX records are set.

    Now what it works and what it doesnt:

    RECEIVING Emails

    1. When i open old inbox [email protected] and if i send an email test from external email adress to [email protected] (new domain that i added) , i get this email in the OLD domain inbox, just as i wanted to be ...but the only problem is that ...when enter that email..instead of showing that it was send to [email protected] it shows like it is send to [email protected]

    Sending EMAILS

    2. When i try to send from old inbox email and activate the FORM button and i send as [email protected] i get this error

    Delivery has failed to these recipients or distribution lists:


    You are not allowed to send this message because you are trying to send on behalf of another sender without permission to do so. Please verify that you are sending on behalf of the correct sender, or ask your system administrator to help you get the required permission.

    Diagnostic information for administrators:

    Generating server:

    #MSEXCH:MSExchangeIS:/DC=local/DC=xxxxxxxxxxx[578:0x000004DC:0x0000001D] #EX#

    So , i can recevice emails now at the newly created domain..but i cand diferentiat the emails...that they are for or and i cant send any emails as the new created domain.

    Im new in Exchange 2007 so please tell me if i am doing sometthing wrong ...or what do i need to do so some of our employers can use 2 email adress at the same time in ..the same instance of outlook.

    I really hope i got myslef understand...if not..please feel free to ask me anything

    Thank you very much for your help


  • #2
    Re: add other domain to Exchange 2007

    You cannot pick and choose email addresses from the list on the user account.
    As far as Exchange is concerned, all users only have one email address - the default. All others are aliases for INBOUND email only.
    Furthermore, Exchange will correct the address so that it is seen as going to the new address.

    If you want to be able to send email from two different addresses then you need two different accounts. The default WINDOWS account will need to have Send As permissions on the second account. You can then either add the second account to Outlook (requiring Full Mailbox Permissions) or just forward it to the first account.

    Simon Butler
    Exchange MVP

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    • #3
      Re: add other domain to Exchange 2007


      I've been able to pull this off by creating new users and associated mailboxes in our Exchange 2007. Then assigning the reply to address to be [email protected]

      I give the person responsible for monitoring emails sent to that account Full Access and Send As rights to that mailbox.

      Using the "Open these additional mailboxes" option in Outlook I then added the new mailbox to the outlook client of the person that will be responding to mail sent to newdom address.

      Mail sent to the olddom address goes into one Inbox and mail sent to the newdom address goes into a different Inbox.

      When they respond to email in the inbox associated with the account it automatically changes the from to the replyto address of the account.

      Good Luck.