[throwaway2556]

If anyone wanna try out XMPP, Conversations is a good client for android, available on fdroid. Dino is a good Linux client. IMO dismail and trashserver seem to be good public servers, if you don't wanna host yourself [1][2].

[1] https://dismail.de/

[2] https://trashserver.net/en/

You're gonna hear some saying it's all oh so secure. But be aware of tradeoffs [3].

[3] https://infosec-handbook.eu/blog/xmpp-aitm/