@didnt1able
If you don't want to selfhost with pi (its recommended) you can use disroot.org cloud witch uses Nextcloud and has all implementations of it (calendar, contacts, tasks etc). You get 4GB and e-mail witch can use PGP keys for encryption of e-mails. Disroot is legit alternative imo, and GDPR compliant.
@ben_dw

@didnt1able
It is, they don't implement their own encryption like Tutanota or Protonmail, but there is IMAP option so you can use Thunderbird for example to do encryption of e-mails with PGP if you are too lazy to do it manually. We can argue now if that if that is better than other e-mail providers which use their own encryption but I'm not expert to judge that.
@ben_dw