"Secrecy of correspondence" is a longstanding legal principle in many countries (e.g. in Germany since the unification in 1871, in the US there was a supreme co

"Secrecy of correspondence" is a longstanding legal principle in many countries (e.g. in Germany since the unification in 1871, in the US there was a supreme court ruling in 1877) The only way to guarantee secrecy is through encryption, preferably e2e.