In marketing speak &quot;NSA proof&quot; is the new post-Snowden[1] &quot;military grade encryption&quot;<p>Email is hard to secure and identified personal accounts are difficult to keep private.<p>The &quot;better&quot; answer is to do what those on Wall St figured out after various scandals and Sarbanes-Oxley - if you want something to remain private keep it off email.<p>[1] Sorry.