Users have a Self-Service option to report phishing or junk/SPAM email:
1. Login to webmail.unt.edu (pic below)
2. Right-click (or control-click for Mac) the email in question
3. Choose Security options, then Junk or Block or Phishing and you can report it. There are over 10k pieces of spam filtered out for each user, each month! A few always seem to slip by.