I've noticed that spammers are taking advantage of the 'Out of Office' reply. I have many users responding to the spam by means of there 'Out of Office' reply. So once that user responds to the spam, it continues to come into that users inbox.
How can you put a stop to the spam once the 'Out of Office' replied to it already? I'm attempting to freeze them on the Exchange server, but I can't keep up with them.
Examples of the spam email:
This is a very clever way to spam legitimate accounts. Spammers are getting smarter.