While they're reinventing the wheel at every step, the default email protocols involve your email being unencrypted at every hop until it reaches destination. While their solution in effect also has the same issue, they allow for sending encrypted emails you can only open by clicking on a link to decrypt them, or similar. And everything at their end is fully encrypted, which is why i bought in...But its getting old at how everything is a closed ecosystem not playing nice with anything else in any OS.