My email was hacked and spam sent to all of my contacts (only 4 spam emails were in my sent folder).  I've changed the hotmail password and am in the process of changing my other passwords as a precaution.  During the process about 40 minutes ago I noticed that I received three delivery status notification delays.  I think the spam emails are still trying to be delivered but I'm not 100% sure.  If I'm right, is there anyway to stop them and prevent others from being sent?