Can Exchange 2010 send internal emails to a specific internal recipient through an external MX?

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http://serverfault.com – Summary Can you force Exchange 2010 to send internal e-mail to a specific recipient to the server specified in the MX record for its domain, instead of just passing it directly to the internal inbox? Details Email for my workplace is first accepted and stored at some third party host, then fetched (with IMAP) by an Exchange server. I'd like to use GMail instead of Exchange, so I've disabled email fetching and configured GMail to fetch it instead. That works for externally received emails, however, internal email from other Exchange users still comes to my Exchange inbox. Attempted solutio (HowTos)