The PureMessage software scans the incoming mail at the UH.EDU gateway and assigns each message a Spam Score. Based on the Spam Score, the mail is processed as follows:

0-50% Delivered as good mail
51-80% Possible spam — Flagged and delivered to user mailbox
81-90% Probable spam — Delivered to Quarantine folder (not counted against user mailbox quota)
91-100% Unwanted spam — Blocked and not delivered