Re: smtp.gmail server CHANGES From & Reply headers!
One small caveat is that clients will need to be in one of our local networks in order to send mail through them.
It means that you can't send anything when you take your laptop to a library, to your friend, or to your business trip...
Sorry, I don't get it why? Why you don't support the old plain authentication as we used to use before? -- Keep it simple, it'll become complex by itself...