What does HackerNews think of magma?
The magma server daemon, is an encrypted email system with support for SMTP, POP, IMAP, HTTP and MOLTEN,. Additional support for DMTP and DMAP is currently in active development.
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If you're having déjà vu, it's because there is also an encrypted email service called Magma:
I'm actually kind of surprised to see the only reference to lavabit, in all of the comments, is that it was shutdown. It seems to be back and their server is open source: https://github.com/lavabit/magma although you can pay for their hosted version also: https://lavabit.com
Lavabit: https://lavabit.com
It looks like you can run the server on your own hardware, but I have not tried this so YMMV. https://github.com/lavabit/magma
Code for Magma Mail Server: https://github.com/lavabit/magma
Code for DIME (Dark Internet Mail Environment):https://github.com/lavabit/libdime