I looked at protonmail about 6 months ago but decided its free service was too limited (no imap/pop3 access) and the paid service was too expensive. I ended up

I looked at protonmail about 6 months ago but decided its free service was too limited (no imap/pop3 access) and the paid service was too expensive. I ended up going for https://mailbox.org/en/ https://mailbox.org/en/ which is not free but much cheaper, and seems to offer a reasonable level of security, privacy and functionality.