Proton does not offer SMTP or IMAP (except through a special tool which can't be used on mobile devices) so as far as I am concerned they're not a real "email"

Proton does not offer SMTP or IMAP (except through a special tool which can't be used on mobile devices) so as far as I am concerned they're not a real "email" provider at all. I totally understand why they do that. It's just not for me.