Question about email relay RRS feed

  • Question

  • Hello , 

    We have for our customers a hosted exchange 2k7 SCC installation with sp2 . A customer that have an exchange 2010 installation wants to transfer all of his email to our server but he wants to do it slowly . First he wants to transfer 50 email accounts and then all the other. Is this possible somehow ? Maybe with transport rules to relay some accounts from his server to ours ? He wants to keep the mx records to his own dns . 


    Tuesday, October 23, 2012 8:14 AM

All replies

  • Hi,

    I would set the accepted domain type to 'Internal relay' and create a send connector with an adress space set to <the_domain>, the smart host being the other Exchange. This to be done on both installations.

    When you wan to move an account, change its email address to something else than xxxx@the_domain on the source installation, so that an incoming email to it be forwarded to the newly installation.

    But you still have to deal with the move of the mailbox itself.

    Christian G.

    Tuesday, October 23, 2012 10:26 AM
  • Hello and thanks for the answer ! 

    So is this <<trick>> bi-directional ? Can the users that will move to the new Exchange Server send email ? And if yes they will pass from the old Exchange ?  If i have both email to Internal Relay is there maybe a possibility to create problems with email loop in both exchange servers ?

    Thanks again 

    Tuesday, October 23, 2012 11:17 AM
  • Yes you can make it bi-directional.

    if you have a send connector in the target domain pointing to source domain  


    yes they can send email.


    yes it's a temporary configuration.

    email loop will happen. if you send an email to an account does not exist.

    Satheshwaran Manoharan | Exchange 2003/2007/2010/2013 | Blog: | Please mark it as an answer if it really helps you ------------- I do not represent the organisation I work for, all the opinions expressed here are my own. This posting is provided "AS IS" with no warranties or guarantees and confers no rights.

    Tuesday, October 23, 2012 12:56 PM
  • Putting the domain type to 'Internal relay' tells Exchange that if a recipient in the domain is not found in the local Exchange server, it should be forwarded to the peer server using the send connector.

    Indeed, a loop can occured if a recipient is not to be found on any servers. But if recipient filtering is enabled on both side, that should not happen IMO.

    That's how it works when you perform a cross-forest migration where mailboxes among the same domain can be held in different orgs.

    Christian G.

    Tuesday, October 23, 2012 1:06 PM
  • Thanks a lot for your answers , I will try it immediately and i will come back for any small questions i may have ! 
    Tuesday, October 23, 2012 1:13 PM
  • Hi A.Psomas,

    For hosting related issue, please post the problem in:, your understanding would be appreciated.

    Fiona Liao

    TechNet Community Support

    Wednesday, October 24, 2012 8:31 AM