I just tested Web Key Directory support on https://beta.protonmail.com/ and it works very well! You just type contact’s e-mail and with no further questions you get a green padlock if the key is reachable via WKD.
I wonder if they would refresh the key via WKD if it expires (just like GnuPG does). Well… we’ll see…
@wiktor It did indeed, thanks.
Couldn't reply (at least not encrypted) as your key (DFBA514…) wasn't attached or available from a public key server. I assume it's a throwaway key anyway.
Yep, it indeed is as throwaway as it could be but as far as I remember ProtonMail also provides keys via WKD so you could try to fetch “my” key via my throwaway e-mail address…
@wiktor Ah, yes, that worked.
It was your signing key that my client (Thunderbird/Enigmail) couldn't find.
Just sent you a message from my throwaway account. Seems to work! :)