if you actually want others to be able to read your email, it can't be encrypted at some point. PGP et al lost the battle a long time ago, which is pretty much exactly the point here. This isn't just in the US that this is problematic, by the way. Most governments reserve this kind of right for "law enforcement" purposes. For instance:

https://www.google.com/transparencyreport/governmentrequests...

Also, you've been able to locally encrypt your Chrome sync data for quite a while now.