By the way, do you even know #matrix already? Similar to #xmpp it is a decentralized alternative to #whatsapp and stuff. It brings end2end-encryption and voip support. It is very modern and there are feature-rich crossplatform clients like #riot.
If you like decentralized and free (as freedom) networks like #mastodon, have a look!
@uhrheber what i am trying to say is https://social.tchncs.de/media/LW125dQAj9axVpz8u18
Special or not, not only are you hosting a public Matrix instance... You host frigging email in there. Surely other self-hosters would love to see how you manage to get an idea how much work it must be. Not that most projects aren't well documented, but synapse isn't trivial, and the more people writing about it, the easier it becomes. You already have the blog running after all... And even that by itself is an interesting setup. There's a lot to learn in #tchncs.de.
I can't believe I filled a toot with that... ANYWAY, I'm personally more interested in Matrix and Mastodon setups, which both have trumped my attempts to set them up. And email is always interesting, the internet is filled with people advising not to self host email, and there you are.
Aber #Matrix ist momentan auch nur für die technisch interessieren... Warum gibt es keine dezentrale, freie verschlüsselte Alternative zu den ganzen #WhatsApp oder #telegram Messengern? Ich würde gerne meine Freunde und Verwandte mal zu so etwas überreden aber mehr als #Signal ist nicht drin...