+1 for Persona. Previous discussion: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10436123" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10436123</a><p>Re: privacy &#x2F; security, I really wish they hadn&#x27;t dropped Thunderbird.