We currently use Gmail for our support email. For transactional email (reset password, etc) we just use default Linux Postfix server on our Amazon Web Serivce EC2 instance.
My question is would it be possible to configure it so that we can send our transactional emails (welcome email, forgot password, etc) using Gmail servers? My guess would be that it's not possible but I'm curious as far as explanation why this would or would not work.