On basic principle of the hacker ethic is decentralization. So please don’t use all the same server. Only one server can easily be monitored or censored, by taking down the server.
Here is a list of xmpp servers, which can be also accessed via the Onion:
You can find me at anonymiss (at) creep.im if you want …
If you know more servers, please write a comment!
[UPDATE] 2017-03-19 – Added some new servers to the list. My thanks are going to the readers for their input.
[UPDATE] 2017-03-26 – Added two new servers: metalgamer.eu and jabjab.de. Thanks for the input.
[UPDATE] 2017-05-21 – Added a new servers: evil.im. Thanks for the input.