The Dark Mail Alliance is an organization dedicated to creating an email protocol and architecture with end-to-end encryption.
In October 2013, Silent Circle and Lavabit announced a project to create a more secure alternative to email and began a fundraising effort. The Dark Mail Alliance team consists of Phil Zimmermann, Jon Callas, Mike Janke, and Ladar Levison.
Dark Internet Mail Environment (DIME) aims to be a secure communication platform for asynchronous messaging across the Internet. It was presented by Ladar Levison and Stephen Watt at DEF CON on August 8, 2014.
There have been multiple revisions for DIME specifications. The latest revision is presented as a preliminary draft.
Magma is the reference MIME server implementation. It supports server side encryption, SMTP, POP, IMAP and HTTP.
Volcano, a Thunderbird fork with DIME support.