How about Pond as email replacement?
I've looked at Pond long enough to see that it calls upon Tor for most of the anonymity heavy-lifting, and that it is clearly targeted at technical users. Most of the people in my life who I speak privately to are not technical. I don't think trivial UX is near in Pond's development roadmap.
I'm curious what you (and others here) think about Keybase, which also seems heavily targeted at normal users. There was some discussion here in mid 2014, but Keybase has been tweaked a lot since then. I'm quite impressed with its usability, but I don't have the expertise to properly evaluate its security. I am uncomfortable with the option of uploading private GnuPG keys, and counting on symmetric encryption for securing them. Better I think would be helping users understand how to properly migrate keys between devices, or perhaps to use smartcards.
Keybase could have been a great way to encourage PGP uptake among normal people years ago when things were accepted to be difficult universally, but PGP's days are behind us. PGP makes a good way to sign code but remains a terrible way to communicate securely, because although it's "uncrackable" when used correctly, it's very easy to accidentally screw up using PGP on either end of the conversation. Also, the lack of PFS ignores parts of the modern threat model that were speculative when PGP was created. Suffice to say that, even ignoring the issues with Keybase encouraging key escrow by "allowing" or encouraging key upload (!!!), I don't think it helps. Perhaps as a basis on which to build a web-of-trust that can be transposed into newer cryptosystems, but the key escrow part makes falsification of trust a real possibility. Anyway, maybe that's just me. -- Twitter: @onetruecathal Phone: +353876363185 miniLock: JjmYYngs7akLZUjkvFkuYdsZ3PyPHSZRBKNm6qTYKZfAM peerio.com: Use email or phone. Uses above miniLock key.