@delta well, it gets increasingly pointless/annoying to “self host your mailbox addresses” :)

There were two main points to do that:

• custom, easy to use and recognizable identity so you could say: “hey, message me at bob@kovalski.me”.

• being able to reuse the same identity for both mail, DC and maybe other services like XMPP.

There are plenty of messengers with QR-codes and long weird links but these things scare people. They are not very human.