I'm looking forward to seeing how Front stacks up when ready! :D Email clients seems to be a strange place where you can get acquired before you even launch... so maybe we'll never see a public product if you innovate <i>too</i> much! :D
I'm surprised that Mailpile[0] wasn't mentioned at all. It's something that I'm watching very closely.<p>[0] <a href="https://www.mailpile.is/" rel="nofollow">https://www.mailpile.is/</a>
Is there nothing to build on top of? A "e-mail" dev framework (open source if possible) with hooks so that you can focus on only front-end, or something similar?