Trying to proxy for MTA-STS config but when the server is behind nginx proxy manager it is not passing request for anything in the .well-known directory to the back end server. I am sure this probably has something to do with config for the Let's Encrypt stuff to work but is also very limiting in what we can host behind the nginx proxy manager. Trying to run this all through the proxy for a central place to manage all Let's Encrypt certs. Is this expected behavior or something that can be addresses with custom config or something?