can someone explain what this website whats to proof? Why would I upload my private images to some website? would that be as stupid as using google photo in the first place?

oh ok, I have not tried that yet. I have only set up one address which I use yo send and receive from.

about the encryption: I thought the point with e2ee encryption on proton is mainly, that the mails are stored encrypted one their servers so they can not read them or hand them out to anyone.

oh so only when using their client I have the e2ee for the emails on their server? kind of makes sence but def. a point to take into consideration.

do you know theit reason?