I’ve been trying to use Matrix to replace sites like Discord or Slack. But it seems that if a user creates an invitation-only room in a server, then invited users who are registered on other servers get errors when trying to join. Not very useful error messages either: “Failed to join room”. (In my case, I tried creating accounts and rooms at nitro.chat and then at converser.eu, but friends registered at matrix.org don’t manage to join).
Quite a let-down. Anyone who’s facing the same problem and has maybe managed to solve it?
Below the sentence you quoted
However, this does not necessarily mean federation is off the table, possible avenues are:
Implement our own federation protocol
Implement a promising up and coming federation protocol, polyproto
Implement the Matrix protocol (unlikely, obtuse and unstable)
- Implement the XMPP protocol (battle-tested and stable)