See https://encrypted.google.com/search?hl=en&q=google%20David%2...
Back when I worked in the early days of email (pre internet) on dialcom systems. I had level 6 (SYSAD) on all of Telecom Golds prime's plus Level 7 on the Billing systems and even the BT Security had mandated removal of some of the interesting commands
There where probably 15 or so people in the country that had that level of access
"When you upload, submit, store, send or receive content to or through our Services, you give Google (and those we work with) a worldwide license to use, host, store, reproduce, modify, create derivative works (such as those resulting from translations, adaptations or other changes we make so that your content works better with our Services), communicate, publish, publicly perform, publicly display and distribute such content. The rights you grant in this license are for the limited purpose of operating, promoting, and improving our Services, and to develop new ones."
I could easily argue that spying on your email in order to gain advantages in acquisitions or hiring could be justified for "improving [their] Services" or "to develop new ones".
[0] https://www.google.com/intl/en/policies/terms/ [1] https://static.googleusercontent.com/media/www.google.com/en...
You would lose in front of virtually any judge if you argued that.
What part of their T&C (or existing law?) prevents Google from reading your email?