alt Hacker NewsI've run an XMPP server in various states of professionalism for around 20 years now. From mom's basement all the way to a colocated server with a similar setup that's described in the post.
The only caveat I have not been able to solve is hosting an xmpp server for a different domain, like it's possible with email.
A client connecting the account [email protected] will find the server it wants to connect to via SRV to be , e.g., xmpp14.example.COM and expect a TLS certificate for "example.ORG" which that server does not have (nor can/should easily get) - which makes sense in a lot of ways, but limits the ways one can offer hosting services.
If anyone has creative solutions I'm all ears.
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You need a certificate for the domain you are going to serve of course. You can get one with ACME DNS challenges pretty easily (I have my clients set up a CNAME for the _acme-challenge subdomain of their domain).
I know at least two services that offer hosting with your own domain: https://my.snikket.org/ and https://account.conversations.im/domain/ so I suppose it is not that complex to setup.