Mailu Let's Encrypt fails behind Traefik

Hi everyone,

I'm experiencing troubles trying to install Mailu behind treafik.
Because of the reverse proxy Mailu is not able to get let's encrypt certificates so I will not be able to have a secure mail server.
To check if is a Mailu problem I tested the server with no autentication and worked well.
Can you help to set the right labels on the mailu instance to allow the path prefix for generating certificates in some way ?
I think that the right path is /.well-known/acme-challenge/

Thanks very much for your support !