Nginx MTA STS Configuration

mta-sts-nginx

# This
location ^~ /.well-known/mta-sts.txt {
   try_files $uri @mta-sts;
}

# Or This
location @mta-sts {
#  add_header Content-Type "text/plain";
  return 200 "version: STSv1\nmode: enforce\nmx: mailserver.example.com\nmax_age: 1036800\n";
}


# MTS-STS Directory
location = /.well-known/mta-sts.txt {
    auth_basic off;
    allow all;
    default_type text/plain;
    try_files $uri =404;
    break;
}

location = /.well-known/mta-sts.txt {
    default_type text/plain;
    return 200 "version: STSv1\r\nmode: enforce\r\nmx: *.naut.ca\r\nmax_age: 604800\r\n";
  }