This is not working. Google still modified sent email headers to make all your communication traceable (also for the government). All your identities can be traced into google account. The modified header data is Sender and Devivered-To. Many implementations of mail servers treat these fields in higher priority over others, causing the replies by senders going to google address! This happened to me many times.
The only way to disinfect this would be to have a script on your own server to remove google crap. Any volounteer?