NIS 2010 Security History Reports - Blocked email details?

I notice that my monthly security history report will include an average of 20 emails that have been blocked, but I am unable to see any detailed information regarding the sender's id to verify that those were in fact spam emails. I've tried double clicking on individual items displayed, but nothing happens - no additional details beyond severity, activity, status, date & time.  Is there a way to do this? Thanks in advance.