For those who have never read a mail header, I just tested a message sent through GMail's SMTP server from OS X. Not only is my public IP address in there, but

For those who have never read a mail header, I just tested a message sent through GMail's SMTP server from OS X. Not only is my public IP address in there, but my "inside the NAT" address is on it as well. I suppose we must add Google and Apple to the IP address leaking villain list.