If you use Xandros Linux and decide to install Popfile, a well-know cross-platform Spam filter, know that when you set up your e-mail client to access your POP server you must set the incoming port to 7071. In addition, when you want to view the web-based set-up interface, you must type in 127.0.0.1:7070. Note the difference in port numbers: 7071 for your e-mail client and 7070 for your browser. I have these here because the current default Debian (which Xandros is based on) instructions are silent on this.