One of Traefik's shortcomings with ACME is that you can only use one api key per DNS provider. This is problematic if you want to restrict api keys to a domain, or use domains belonging to two different accounts. I hope Nginx will not have the same constraint.

This is one of the main reasons Caddy stopped using lego for ACME and I wrote our own ACME stack.

You can use CNAME to handle multiple DNS challenge providers. https://doc.traefik.io/traefik/reference/install-configurati...