In the Exchange System Manager, stop the Default SMTP Virtual Server,
then open a Windows Explorer instance, then navigate to the following
directory
\Program Files\Exchsrvr\Mailroot\vs
i 1\Queue
There you will see all the e-mails in your exchange queue waiting to go
out (NTFS_hexadecimal-code.EML
).
Select them all and hit delete.
*PLEASE NOTE THAT THIS WILL DELETE EVERY E-MAIL THAT IS IN YOUR QUEUE,
GOOD AND BAD!!*
When you're done deleting, go back to ESM and restart your SMTP server.
You should have a nice default queue status when you view your Queues in
ESM.
How to Delete Messages from Queues in Exchange Server 2003
http://support.microsoft.com/kb/822944How to block open SMTP relaying and clean up Exchange Server SMTP queues in Windows Small Business Server
http://support.microsoft.com/kb/324958