Cannot Send email from exchange 2003 to exchange 2007

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    eyalos
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    #143491

    Hi guys

    I have exchange server 2003 in my organization on windows server 2003
    I just install exchange 2007 server on a different windows 2003 server,
    I create some new mailboxes on the 2007 and transfer few from the 2003 to 2007
    Now when I am sending Email from the server 2007 to exchange 2003 everything working well and the user get the Email

    But when I am sending Emails from the exchange 2007 to the old exchange 2003, the Emails stay in the Queue and not being deliver

    The Only thing is I think off is I am working with is smart host , so I remove it and create SMTP smart host to send Email threw my ISP

    any idea how to solve this Issue ?

    Thanks

    Eyalos

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