Ask HN: How much of a concern is privacy/security in emails for you?

Having just recently watched Citizenfour and progressively rolling out the beta for my email app (www.slidemailapp.com), I wanted to take a moment to quickly poll HN on their viewpoint on email security.

1. Do you actively think about vulnerabilities in the email systems you use? 2. Are you concerned with privacy and would you switch over to an email client that provided more security and privacy? 3. If so, which security/privacy measures would you like to see implemented in a client?