Exchange 2003 large message stuck in queue "ACTIVE"

All,

I have someone who was able to send out a 9 MB attachment to 20 people via Exchange 2003, dragging their 384kbps upstream internet to a grinding halt.  I am unable to remove this message from the queue.

The queue in Exchange states it is ACTIVE with a remote smtp server, however, the "number of messages" read 0, the Exchange Queue directory is empty. I need to stop this thing from sending!! Any ideas?
Darren KattanIT ConsultantAsked:
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Alan HardistyCo-OwnerCommented:
Block tcp port 25 outbound on your router, then the exchange server can't send mail.

Once it can't send, it will sit at retry and then you can delete the mails.

Then unblock your tcp port.
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Darren KattanIT ConsultantAuthor Commented:
Brilliant! Thanks a lot!
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