@rf , I'm working on a compilation article about how to use #Matrix

1. What in-depth guides could you suggest about matrix self-hosting, security, etc? I found [1]
1. What are the proper way to disconnect my self-hosted server from matrix federation? Just change federation port from 8448 doesn't seem fair.
1. What changes for account account@server.com, if server.com does no longer exist?
1. I know that I can configurate matrix server not to log in accounts from other servers. How?
1. What is good to know for a new user? for a new administrator? best practices?

[1] cs.ru.nl/bachelors-theses/2020