An XMPP server. Users with local accounts (long time friends) have almost no restrictions on what can be sent, file size, etc. We have private groups set up, dms, public rooms, etc, more or less like discord. After trying many of the popular chatting and file sharing platforms XMPP seems to be the one that works best for the most people on the most platforms within our group. YMMV.

Ah, my bad mate. It looks like you were able to find what you were looking for on Voyager though.

Is it possible somehow? Maybe a client with this functionality exists?

I know it exists on Boost:

Full disclosure Boost isn’t FOSS if that’s a deal breaker for you. There are probably other apps with this functionality too.

You fuckin druggah