Tutanota now allows 3-letter user names

Got mine. It's also on github: https://github.com/tutao/tutanota/

A very promising gmail alternative I would say.

Interesting that the website of an encrypted mailbox solution is (according to Chrome) using a "weak security configuration" (and, as a result, is showing the infamous red padlock in Chrome).

So does Lavaboom (PGP encrypted email, still in closed beta). You can reserve a username here: https://mail.lavaboom.com/secure