I was also just using Facebook as an example. The other examples you just provided are the same. What is wrong with the current group of email standards? And w

I was also just using Facebook as an example. The other examples you just provided are the same. What is wrong with the current group of email standards? And why can't those problems be fixed by extending the existing standards? Facebook is centralised. It is run by a single profit motivated company. I can't set up a Facebook messaging server. I can set up an email server. Email is distributed because anyone can set up a server.