http://j4dhkkrfv66no3miwc7dv22cytk4rcjlsv6yqsjxgcnkswxqlbjuh2qd.onion/en/services/email
You can then apply a special decoding process and you will get the original data back. By keeping the decoding process a secret, nobody else can recover the original data from the encrypted data. You can use Mailvelope, a browser add-on in Chrome, Edge and Firefox, that securely encrypts your emails with PGP using Disroot webmail.