pdwas, you wrote on Fri, 17 Apr 2009 22:28:01 -0700:

What does it mean when a reply to an email has this: [!! SPAM] in the
subject line of the original email that had been sent?

This hint has been added by a spam tool that has identified this mail as
SPAM. Outlook's own Junk-Mail-Filter does not modify the subject or the
mail body of an spam email. You should be able to disable adding this
hint in the options of the tool you're using for malware protection.

--
Best Regards
Christian Goeller

MVP - MS Outlook
http://www.outlookfaq.net