It doesn't cover that this potentially breaks the Secrecy of Correspondence, which is a fundamental law in some countries, including Switzerland. IANAL, and cer

It doesn't cover that this potentially breaks the Secrecy of Correspondence, which is a fundamental law in some countries, including Switzerland. IANAL, and certainly not a Swiss one, but in Germany, there is a similar project (EPostBrief), which suffers from that problem: once the letter is unwrapped, the law doesn't bite anymore, as it doesn't apply to digital transmissions. https://en.wikipedia.org/wiki/Secrecy_of_correspondence https://en.wikipedia.org/wiki/Secrecy_of_correspondence It doesn't matter how much your provider insists that they keep things secure.