How to clear the Qmail Queue?

[Aalesund]

Hi,
in my website, I use a script to send emails to all non-active users to warn them that if within 30 days not visit the site and log in, their account will be deleted according to our terms of use. But the problem is that some of them have no real email addresses or incorrect addresses. Thus accumulate dozens emails in Qmail. So can you tell me hot to delete Qmail queue? I don't see any options in CentOS WebPanel. There is only Postfix Mail queue to inform me that I have 211 (at the moment) emails in Postfix mail queue.

[carmageddon63]

-mailq  see quee

-postfix flush force send

-postsuper -d ALL delete all quee

[Administrator]

on wiki/FAQ you have some mail server commands
http://wiki.centos-webpanel.com/