The SMTP proxy adds messages to different categories based on analysis by spamBlocker and Gateway AntiVirus. The Quarantine Server displays these classifications for quarantined messages: Suspected spam — The message could be spam, but not enough information is available to make a determination. Confirmed spam — The message is spam. Bulk — The message was sent as commercial bulk email. Virus — The message contains a virus. Possible virus — The message might contain a virus, but there is not enough information to decide. DLP violation — The message contains content that matches a configured DLP rule.