disabling some users

"123Test Test" <[email protected]> Mon, 30 Jan 2006 11:20:20 +0000

Newsgroups	gmane.comp.djb.checkpassword
Message-ID	<[email protected]>

Hi all,
      I have successfully installed check password and integrated it with 
qmail-pop3d. All regarding popping emails is fine.

     But in my system, say if any user doesn't pay my bills, then i would 
like to disable him from popping emails. How do  I disable him from popping 
emails ?

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