https://tuta.com/pt-br
https://disroot.org/en/services/email
http://mail2torjgmxgexntbrmhvgluavhj7ouul5yar6ylbvjkxwqf6ixkwyd.onion/
http://xdkriz6cn2avvcr2vks5lvvtmfojz2ohjzj4fhyuka55mvljeso2ztqd.onion/
http://fozdean5ayswi6jtseg2fgyysqt3dskoosmoc6gnqia4dxwxiuvg3oad.onion/

O tuta tem criptografia de ponta a ponta.