Just come across this. Haven’t dug too deep but sounds like an interesting opportunity. I think it can only succeed if it is fully compliant with current systems. Seems to only be mobile clients. No desktop? Are big tech going to permit this to grow? It would shut down a data mining opportunity …
Email is already open and fully distributed.
The fact that most people gravitate to a few large providers isn’t really related to email as a system IMO.
The big email providers will send all of your mail to spam if you selfhost it though.
It depends a lot on IP reputation, but that can definitely be an issue.
Yes, can be an issue. But if you set it up right, use dkim/dmarc/SPF, and don’t do stupid things like spam people, you’re good. It isnt hard. It is just hard getting a static IP for a homelab, really.