This looks VERY good. Over 30 years, I have used/hosted/paid for all sorts of email systems. For myself and clients POP/IMAP/Exchange/etc. Mutt/Eudora/Outlook

This looks VERY good. Over 30 years, I have used/hosted/paid for all sorts of email systems. For myself and clients POP/IMAP/Exchange/etc. Mutt/Eudora/Outlook/Mail.app/ThunderBird/etc/etc/etc ISP/own servers/managed servers/Fastmail/GMail/etc Currently, I use FastMail for my personal and my own businesses, and Gmail with my Employer. I very much Like FastMail, but very much dislike Gmail. Hey.com really looks like it is solving many issues with using and email interface and workflow. Many of these issues are not solvable with standard email servers. So I get why they are not running a plain IMAP server. Still for myself, I would need to wait for Domain support, and at least some sort of live sync to a IMAP server for backup. Alternatively, maybe FastMail could layer some of these ideas on top of their IMAP based systems. (I hold little hope of gmail improving)