/etc/procmailrc
From Qmail Info Wiki
/etc/procmailrc:
SHELL="/bin/sh"
#LOGFILE="/tmp/procmail.log"
#VERBOSE=on
VPOPHOME="/home/vpopmail"
DOMHOME="$VPOPHOME/domains/$DOM"
USERHOME="$DOMHOME/$USERNAME"
DEFAULT="$USERHOME/Maildir"
HOME="$USERHOME"
INCLUDERC="$USERHOME/.procmailrc"
:0 w
| /usr/local/bin/safecat "${HOME}/Maildir/tmp" "${HOME}/Maildir/new"

