It was a decade+ ago that Snowden explained to us, with receipts, that the USG has warrantless access to everything stored in Apple (iCloud Photos and iCloud Backup are unencrypted and contain a copy of everything on your device), Google, Microsoft, Amazon, et al. You have to be an ostrich with your head in the sand to not be well aware of this at this late juncture.
You'd have to be a moron to let the feds read all of your mail without a warrant by default - any country's feds.