http:
  routers:
    mail-certificate:
      rule: "Host(`mail.rentaldrivego.ma`)"
      entryPoints:
        - websecure
      service: mail-certificate-placeholder
      tls:
        certResolver: letsencrypt
        domains:
          - main: "mail.rentaldrivego.ma"
  services:
    mail-certificate-placeholder:
      loadBalancer:
        servers:
          # This router exists to request and renew the certificate.
          # Mail protocols are not routed through this HTTP service.
          - url: "http://127.0.0.1:65535"