Filtering Mail Already In Queue

["Aaron Goldblatt" <qmailconfused@gmail.com>]

Apparently there was some kind of quota burp on my system and the
result looks like this:

/service/qmail-send: up (pid 26502) 6137 seconds
/service/qmail-send/log: up (pid 26464) 6162 seconds
/service/qmail-smtpd: up (pid 26506) 6136 seconds
/service/qmail-smtpd/log: up (pid 26463) 6162 seconds
messages in queue: 665789
messages in queue but not yet preprocessed: 250985

Most of this is incoming spam from a catch-all that's been open for
many years. I know at some point I need to get around to closing it
(and this situation is exactly why), but for the moment I have a
different issue. An eyeball of qmail-qread indicates that it's all
local delivery; I have not been magically converted into an open relay
in the past couple days.

Mail has started processing again, but at the rate it's going it will
be three or four days to process all this trash, and of course more
comes in all the time.

So my question is, is there a way to spam filter or recipient filter
this garbage and remove it from the queue?  Even a curses-based mass
delete thing would be okay with me at this point.  It seems to me that
most stuff available at qmail.org is based on filtering before stuff
hits the queue, which isn't the issue here.  This stuff is already in
queue.

Thanks.

ag