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What Do Proofpoint Tools Do? Proofpoint tools scan incoming emails for known security threats like spam, phishing, and malware. When suspicious content is detected, the email is quarantined, allowing users to decide whether to release or block it. Quarantined items are sent via a separate email called a Quarantine Digest , providing options to: Release  the email to the inbox. Preview  the content safely in a browser window. Block  the sender to prevent future communication.