Proofpoint is an anti-spam/anti-virus solution for e-mail that both detects and quarantines messages before they get to your e-mail inbox.  

• End User Digest – Users will receive a User Digest in their inbox, containing a list of messages placed in the “Spam Quarantine” for the previous 24 hours. From the digest, users can delete, release, or mark messages as “Not Junk” that were filtered and identified by Proofpoint.
  
  
• Spam Quarantine – Spam Quarantine is a location on the Proofpoint server where all e-mail classified as “Spam” is contained. All filtered mail will remain in Quarantine for 30 days until the messages are deleted or released manually to the user’s inbox.