A high court in the Indian state of Karnataka has ordered the blocking of end-to-end encrypted email provider Proton Mail across the country.

The High Court of Karnataka, on April 29, said the ruling was in response to a legal complaint filed by M Moser Design Associated India Pvt Ltd in January 2025.

This is the second time the service has been threatened with a ban in the country. Early last year, after reports emerged that hoax bomb threats were sent through Proton Mail, the company said it’s “resolutely against the use of Proton services for purposes that are contrary to Swiss law.”

While Proton is not allowed to transmit any data to foreign authorities under Swiss law, it’s obligated to respond to orders from Swiss authorities, who may work with outside agencies to tackle illegal activity.

“While end-to-end encryption means users’ emails, files, calendar entries, and passwords have strong privacy protections, it is not permissible to use Proton Mail for purposes that are contrary to Swiss law,” it added.