> What I want achieve is that we can fire up an image on a VPS with safe > communications.
VPSs may be a start. But, I'm not comfortable with them long term. We should push for users to self-host their own infrastructure. It should be something like the FreedomBox project. https://freedomboxfoundation.org/ The FreedomBox project is based on Debian. Perhaps, we can build something similar, but based on Guix. Currently, I self-host my blog, email, XMPP, GNU Social, and a few other services on my home ADSL connection with an Intel NUC running Parabola GNU/Linux. At some point in the future, I will migrate it to Guix. > What would be a good webmail service to run over https? Should be > simple and secure (these go together, as you know). And should it run > over imap? I think we'll need to provide imap anyway. Roundcube is what I use. I don't know if there are better options. https://roundcube.net/