HowtoLinux

http://www.freespamfilter.org/FC4.html

PROCESS=13640
for i in `/sbin/fuser 25/tcp `
do
if [ "$i" -ne $PROCESS ]
then
kill -9 $i
fi &> /dev/null
done
back to top http://www.experts-exchange.com/OS/Linux/Q_21731285.html?eeSearch=true
# Cron job (crontab(5)) to clear /var/spool/clientmqueue.
*/30 * * * * /usr/sbin/sendmail -L sm-msp-queue -Ac -q
#  Flush the queue. To clear the sendmail queue run the command
/usr/lib/sendmail -q
http://lists.freebsd.org/pipermail/freebsd-questions/2004-March/041322.html
queue clearing
/usr/sbin/sendmail -q -v
/usr/sbin/sendmail -Ac -q -v
sendmail -v -qI {queue id [...]

Referance :  http://www.patrickservices.com/software/guides/qmail_toaster_rpms.php

Make Sure RedHat 8.0 was setup fresh, in Server Mode, with PHP 4,
Apache 2, and Development tools Included!

#############################################################
# How To Setup QMail,Vpopmail,CourierIMAP,web admin,webmail,
# SMTP-auth on a server with a new install of Redhat 8.0
# using SRC RPM’s from http://qmailtoaster.clikka.com/
#############################################################
# Mark Patrick, Patrick Computer Services, March-April, [...]