We are running Exchange 5.5 for our outgoing mail server.
Our outbound queue filled up with thousands of bogus emails from users that don't exist.
It has clogged up our mail server's queue and nothing can go out to email outside of the company.
Oddly enough, the Queue folder C:\inetpub\mailroot\queue is completely empty.
If I tried to select an individual email under the queue using Microsoft Exchange Administrator, it does nothing.
I have attempted to run the aqadmcli.exe utility to clear out all mail items, but it finds nothing.
It is as if my mail queue is empty, but exchange believes it is full.