ProtonMail launched its own .onion address to fight censorship and DDoS attacks, as well as to increase its users’ security and privacy.
I cannot wait to try out the free version of ProtonMail over Tor using their .onion address. This is a great combo I think for anyone trying to secure their email communications. And pretty straightforward in getting it up and running. It’s interface is as easy to understand as Gmail, but way more secure from end-to-end.