Wkd Proton Mail Custom Key
Tried and realised that Proton Mail supports WKD. $ gpg --locate-key user@protonmail.com gpg: key 4DE32C2A10A7EBC2: public key "user@protonmail.com <user@protonmail.com>" imported gpg: Total number processed: 1 gpg: imported: 1 pub ed25519 2021-10-13 [SC] 67731B189D0908618DF665144DE32C2A10A7EBC2 uid [ unknown] user@protonmail.com <user@protonmail.com> sub cv25519 2021-10-13 [E]