With the SpamStopper enabled there are 2 thresholds to consider in blocking spam. The first threshold is the score that an email must meet to be considered spam, and the second is the threshold in which to KILL the message. For example, the default spam score threshold is 3. Any email that scores lower than 3 (various conditions increase the score) is delivered to your inbox. Messages that score higher than 3 (or whatever you have chosen to set as the threshold) are delivered to the Junk Email folder in your Outlook.

To answer the question, the contents of your Junk Email folder would then be the list of message that were marked as Spam.

The other threshold is where you want to set the kill level. Messages that score higher than that number will be deleted outright. They are not stored anywhere, and are not recorded anywhere. So obviously there is some risk in deleting legitimate email in setting the kill level too low. The kill level can also be toggled off so that the server NEVER deletes email no matter how spammy it score.