I don’t use mailbox gpg sevice simple as that. I use mailbox perfect imap (k-9) / pop3 (desktop) integration and use gpg natively in case if that person uses gpg. Thunderbird (desktop), k-9 with openkeychain on android. I don’t say proton is bad. It’s quite good if you never want to export mails outside our webmail. I do want it so protonmail is not for me. Most my protonmail issues were with their bridge they, until the moment I migrated to mailbox, have not resolved.
I don’t use mailbox gpg sevice simple as that. I use mailbox perfect imap (k-9) / pop3 (desktop) integration and use gpg natively in case if that person uses gpg. Thunderbird (desktop), k-9 with openkeychain on android. I don’t say proton is bad. It’s quite good if you never want to export mails outside our webmail. I do want it so protonmail is not for me. Most my protonmail issues were with their bridge they, until the moment I migrated to mailbox, have not resolved.