Someone has a form mail on win2 that is being highly abuse by a spammer because it is vulnerable to mail injection, they are sending almost 50MB of mail a second causing some major problems. I am stopping the SMTP service to prevent the spam from leaving and while searching for the mail form that is being abused.
Re: Temporarily stopping SMTP on Win2
Turning SMTP back on, we have found the form being abused and disabled it, and cleared spam from the queue.