Pipe from SMTP to php script

Hello I am trying to port a unix application to windows, and I need to learn about some common windows SMTP solutions, and how they can port the output of a particular address to a php script.... similar to what would be done with sendmail in a .forward file: "| phpscript.php" If anyone can recommend any free smtp products that I can install on my win2K box to test this, that would also be highly useful. I would like to hear about any ideas about how one could accomplish a similar process from a remote mail server to a local script as well. The objective is, quite simply, to get raw email output from the smtp server to STDIN of the script. Best wishes, and thanks in advance. Kato