How do I expunge (bypass Trash) IMAP messages?

Deco <[email protected]> Fri, 16 Dec 2005 16:15:59 -0200

Newsgroups	gmane.comp.mozilla.devel.unix
Organization	Another Netscape Collabra Server User
Message-ID	<[email protected]>

Hello,
    I use Mozilla Mail and I would like to expunge some messages. That is, 
delete them from folders without them being copied to Trash folder.
    That is particularly important when the IMAP account is near full and a 
message is too big to exist in INBOX and Trash, for example. I consider this a 
necessary feature and I was surprise not to find it in Mozilla (if it really 
doesn't exist).
     Any help is appreciate.
     Regards,
Deco