User Guide

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AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 4 Understanding the Email Pipeline
Incoming / Receiving
Figure 4-3 Email Pipeline — Delivering Email
Incoming / Receiving
The receiving phase of the Email Pipeline involves the initial connection from the sender’s host. Each
message’s domains can be set, the recipient is checked, and the message is handed off to the work queue.
Related Topics
• Host Access Table (HAT), Sender Groups, and Mail Flow Policies, page 4-5
• Received: Header, page 4-5
• Default Domain, page 4-5
• Bounce Verification, page 4-5
• Domain Map, page 4-6
• Recipient Access Table (RAT), page 4-6
• Alias Tables, page 4-6