PHP/cron fetching and processing email from a POP3 account

I would like to write a PHP script that fetchs email from a POP3 account and then processes it based on the content of the email, such as writing it to a CRM database or confirming an ezine subscription. I would then run the PHP script via a cron job every ten minutes or so. I've looked at the PHP documentation some and I could write a script completely from scratch if needed, but I'm wondering if anyone could point me to a reference where doing this with PHP (or Perl for that matter) is discussed. I don't seem to recall having ever seen such an article. Any ideas? Thanks, Reid Wilson reidw@uta.edu University of Texas at Arlington