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Proofpoint, Inc.

Understanding Proofpoint Essential's Mail Flow

Situation Overview of Proofpoint Essentials email process flow. You want to know the mail flow to better understand the path each message follows, and what events may be triggered at specific points during the process.
Solution Email through the Essentials platform is processed step by step.

 

Proofpoint Essentials mail flow

Messages processed through Proofpoint Essentials go through various stages in a particular order which is outlined below for both inbound and outbound.

Inbound Mail Flow

  1. PDR - Proofpoint Dynamic Reputation.
  2. Attachment Defense (if licensed).
  3. Anti-Virus scanning.
  4. Filters: Custom filters and send lists.

    Executables such as .exe, .dll, .bat, .js, and others are blocked before custom filters.

    Any filter that triggers with Quarantine or Allow will skip the Anti-Spam step of processing.

  5. Anti-Spam.
  6. URL Defense Scan and Rewrites (if licensed).

Outound Mail Flow

  1. Attachment Defense (if licensed).
  2. Anti-Virus scanning.
  3. Filters: Custom filters and send lists

    Executables such as .exe, .dll, .bat, .js, and others are blocked before custom filters.

    Any filter that triggers with Quarantine or Allow will skip the Anti-Spam step of processing.

  4. Anti-Spam.