I have an Ubuntu 6.06 setup using the perfect setup created by falko. I followed all the steps for smtp auth, but still cannot get the system working properly. While I can send and receive mail from my desktop (right beside the server) my outside users (outside my four walls) cannot. I have gone through many of the discussions on this forum, but have done all the stuff that they suggest. I am in real need of someone who could walk me through some diagnostic stuff to find out where the problem is and how to fix it.