ProtonMail hit by mystery DDoS attack, preventing customers from accessing their secure email

End-to-end encrypted email service ProtonMail is suffering from an “extremely powerful” distributed denial-of-service attack, that has knocked it offline, and stopped users from accessing their inboxes.

Switzerland-based ProtonMail has its fair share of fans amongst those who wish to keep their communications secret and secure, as its architecture is designed to never give ProtonMail any method of decrypting your messages, even if they were to receive demands from law enforcement agencies – but clearly the DDoS attack shows that not everyone is a fan.