I have read some of the accepted answers and found nothing that fits my situation.
The SMTP queue has a hundred or more different what looks like mail to be delivered!
whatever.whatever.com/org/whatever next (Remote delivery)1-2 even 10 messages then the size 2kb to 90kb.
I have stopped the exchange services and tried to delete these messages and they will not go.
The queue remains full of these messages.
Am I under some kind of attack or am I not doing something right.
Please help I feel this is getting out of control.