@alina@kitten tfw I've been self-hosting my emails for like 6+ years and it's been pretty neat. Would just not recommend it for things like mailing-lists with wanting to send to gmail (which will easily block you, and also still send you spam…).
Meanwhile Matrix, I don't even want to use it, last time I had to I ended up with so many bugs, of course some of them silent so you notice many days later that either messages weren't actually sent or haven't been received.