Mailpile is the new kid on the block in the world of F/LOSS e-mail clients. This talk introduces Mailpile from a F/LOSS hacker's perspective, going briefly into the motivation of the project before delving into demos and technical implementation details. Mailpile is a Free and Open Source Software e-mail client which raised over $163,000 USD last September (on IndieGoGo and Bitcoin) to support development of the first version of the software. Mailpile is built around a powerful search engine and uses web technology for the user interface, hoping to rival GMail and other popular web-mail services when it comes to both usability and speed. The project places a strong emphasis on privacy and decentralization and is integrating GPG encryption as a core feature of the user interface. Written in Python and using modern web technology for the user interface, Mailpile aims to very accesible and easy for F/LOSS hackers to tweak and explore. This talk will serve as an introduction both for potential end users and for folks interested in helping us reboot the world of Free Software e-mail.