Is email truly decentralized? Roll your own and you'll encounter issues with deliver ability just from being new in the market. Large providers manage their own

Is email truly decentralized? Roll your own and you'll encounter issues with deliver ability just from being new in the market. Large providers manage their own block lists and prevent some messages from some ips being delivered at all. This is a practice that shuts down decentralization and creates an oligopoly, although I agree it isn't as severe as the tele situation. There are ways to enter the VoIP market by purchasing trunk access but iirc that's still controlled by a few big players. Another difference is that email in your junk folder still contains the information. Blocking a spam call means no information gets stored.