> Why do I never hear about this ‘feature’ from American products like gmail which 99% of the HN audience is using? Isn’t USA a member of Five Eyes?

There is lot of hate toward Google (and other top US companies). Especially due to autobanning of accounts, 2FA etc. at the moment people have fastmail as their darling - because they are the underdog, no AI forcing in products (at the moment) etc. It is like stripe from 5 years ago.

Most have given up in snooping. Or you need to go to proton mail but it has other issues. Every company is subject to some regulations.

at the end, if the receiver of email has to also keep it safe. Do they?