This document is no longer updated. Maildrop is now being used in my setups rather than procmail because maildrop uses temporary files rather than ram which procmail uses. If you would like to setup domain wide maildrop, please refer to my qmail setup on freebsdrocks.net which is located at

http://freebsdrocks.net/index.php/guides-mainmenu-25/16-installing-qmail/19-qmail-preinstall-checklist