I've recently started using http://mailbox.org http://mailbox.org. It's hosted in Germany by what seems to be a reasonably serious company, and running https:/

I've recently started using http://mailbox.org http://mailbox.org. It's hosted in Germany by what seems to be a reasonably serious company, and running https://www.open-xchange.com/ https://www.open-xchange.com/ for the web UI (mail, calendar, basic docs).