A few years ago, I was surprised to find out that my friend Peter Eckersley — a very privacy conscious person who is Technology Projects Director at the EFF — used Gmail. I asked him why he would willingly give Google copies of all his email. Peter pointed out that if all of your friends use Gmail, Google has your email anyway. Any time I email somebody who uses Gmail — and anytime they email me — Google has that email.
Since our conversation, I have often wondered just how much of my email Google really has. This weekend, I wrote a small program to go through all the email I have kept in my personal inbox since April 2004 (when Gmail was started) to find out.