Mine

#!/bin/sh
QMAILDUID=`id -u vpopmail`
NOFILESGID=`id -g vpopmail`
MAXSMTPD=`cat /var/qmail/control/concurrencyincoming`
LOCAL=`head -1 /var/qmail/control/me`

if [ -z "$QMAILDUID" -o -z "$NOFILESGID" -o -z "$MAXSMTPD" -o -z "$LOCAL" ]; then
        echo QMAILDUID, NOFILESGID, MAXSMTPD, or LOCAL is unset in
        echo /var/qmail/supervise/qmail-smtpd/run
        exit 1
fi

if [ ! -f /var/qmail/control/rcpthosts ]; then
        echo "No /var/qmail/control/rcpthosts!"
        echo "Refusing to start SMTP listener because it'll create an open relay"
        exit 1
fi

        exec softlimit -m 100000000 \
        tcpserver -v -R -l "$LOCAL" -x /etc/tcp.smtp.cdb -c "$MAXSMTPD" \
        -u "$QMAILDUID" -g "$NOFILESGID" 0 smtp /var/qmail/bin/qmail-smtpd \
         /var/qmail/vpopmail/bin/vchkpw /usr/bin/true 2>&1