clear mail queue in qmail without using qmail-remove

To view messages from qmail you can simply type:
/var/qmail/bin/qmail-qread

 To clean all messages:

Stop qmail service

find /var/qmail/queue/mess -type f -exec rm {} \;
find /var/qmail/queue/info -type f -exec rm {} \;
find /var/qmail/queue/local -type f -exec rm {} \;
find /var/qmail/queue/intd -type f -exec rm {} \;
find /var/qmail/queue/todo -type f -exec rm {} \;
find /var/qmail/queue/remote -type f -exec rm {} \;

Start qmail service