Interesting that their FAQ says it's easy to setup, but I don't buy it, at least from previous experience of setting up clients. (I once had to harden my VPS server rather substantially because they are juicy targets for hackers)...And I also once had to make it survive a reboot incase of too many connections were made by people trying to boot the machine offline (DDOS)
(https://www.mailpile.is/faq/#int-6)
> How hard will it be to install Mailpile?
> It should simply be a double-click to launch an installer on Windows, or dragging an app to the Applications folder on the Mac.
> On Linux we hope to provide native packages for most of the popular distributions.