Long-overdue efforts like this absolutely must be applauded. I do wish current e-mail providers would offer encryption of their own, preferably by default. Of course, there’s always the next best thing, encrypting your own emails. There are ways to do this on any e-mail provider using Thunderbird, EnigMail (an add-on for Thunderbird), GNU Privacy Guard. The Free Software Foundation has a guide explaining how to set up your own e-mail encryption.