geoAnte

0.5 GB of text is plenty: the complete "War and Peace" is only 3.2 MB! Those that use HTML e-mails surely should be prepared to pay for their wasteful habits.

These are documents outlining protocols, which might (or might not) be implemented in my mail client software.

So let me rephrase: if I know the address ([exampleUser@proton.me](mailto:exampleUser@proton.me)) what do I have to do to download exampleUser...public.asc (as a file on my computer, not as a key in my mail client software?)

Can an external user who knows someone's address at Proton (for instance, [exampleUser@proton.me](mailto:exampleUser@proton.me)) obtain the OpenPGP public key of that user, without any action on the part of that proton.me user?