Thanks. I am already using this, it seems to be the best so far. But I feel something is still missing from there by the usability aspect. It also uses NextJS which I don't know what to think about...
Disclosure: I build Keenrig, a self-hosted app platform, and I'm considering packaging Stalwart. For people running it: what should a one-click install get right (auto-DNS, cert handling, backups of the data dir) so it doesn't feel worse than a manual setup