[mixcocam]

Take a look at delta.chat Your server can be a traditional email server you set up or one of their optimised devocot, smtp relays: https://github.com/chatmail/relay

The clients are great (they have reactions!)

there is even a really good app store associated : https://webxdc.org/

[zikduruqe]

I actually messed around with Delta.chat this past weekend for the first time.

It's kinda cool. If or when, I need to setup new communication needs, I might use this. (Currently do not have a need for any)