I have read the statement on eff https://www.eff.org/deeplinks/2018/05/not-so-pretty-what-you... and can't think about that this is a PR for Signal. I assume that signal will start some e-mail services soon and try now to shade the current mostly safe communication tools in bad light. I hope I'm wrong, the future will it shows.

It would be interesting to know if the https://darkmail.info/ initiate is still active. As far as I understand this solution are the metadata also invisible at the transport level. Can anyone shade a light on this?