Proton, the Swiss privacy-focused software maker, says it has received a notice of a "possible block" of Proton Mail in India after the service was used Proton, the maker of privacy-focused email service Proton Mail, has received a notice of "possible block" in India and condemned the action.
Its not encrypted when 99% of your contacts aren’t on Proton.
You can encrypt it for non-Proton users very easily.