I am not American so my lense may be a different one. What I am coming from is basically an extension of the German Laws that Govern the Mail Secret (Briefgeheimnis) which actually is constitutionally enshrined in the German constitution.

But has notable exceptions that can be made uppon federal law. The burden for these is supposed to be pretty high.

I think this should not happen willy nilly. And if thats the case in the US I am obviously against it.

It is a complex multi layered subject because it has to weigh the rights of multiple people against each other.