How Do I Route My Email through Gmail? - Ask Leo!
https://askleo.com/how_do_i_route_my_email_through_gmail/
If you use Gmail as your interface, then Gmail will grab your email from your server (Godaddy) and keep the main copy on the Gmail servers. Gmail then can operate as your IMAP server. Exchange, on the other hand, re-routes the entire system, so that all email is pointed, via DNS, through the Exchange servers.
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