I've been using my google account to store mail for a while now, including forwarded mail from client organisations, where this is allowed. The only problem that I've had so far is that when I'm sending mail as another identity (like a client one), it would always come up as "from me@brucecooper.net on behalf of me@the.right.domain" Its a bit annoying, but thats what Google had to do in order to be good email citizens and not get everything marked as spam.