I recently moved all my personal accounts to a VPS instance. I decided on Mailu’s docker compose setup because of its ease of use and it has been working great so far.

I used Oracle’s free tier cloud (4 ARM vcpus and 24GB of memory) and email delivery instances so it’s worth a try, but any other cloud provider offer similar options.

Yes, it’d work just fine because each container listens on port 8000 of their own IP address, not the docker server’s IP address. Caddy/Traefik just redirects traffic to that port.