User Guide

Contents
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AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
SMTP Routes and DNS 24-3
SMTP Routes and Alerts 24-4
SMTP Routes, Mail Delivery, and Message Splintering 24-4
SMTP Routes and Outbound SMTP Authentication 24-4
Managing SMTP Routes to Send Outbound Email Using the GUI 24-4
Rewriting Addresses 24-6
Creating Alias Tables 24-7
Configuring an Alias Table from the Command Line 24-7
Exporting and Importing an Alias Table 24-8
Deleting Entries from the Alias Table 24-9
Configuring Masquerading 24-16
Masquerading and altsrchost 24-17
The Domain Map Feature 24-28
Importing and Exporting a Domain Map Table 24-34
Directing Bounced Email 24-35
Handling Undeliverable Email 24-36
Creating a New Bounce Profile 24-40
Applying Bounce Profiles to Listeners 24-41
Controlling Email Delivery Using Destination Controls 24-42
Determining Which Interface is Used for Mail Delivery 24-43
Default Delivery Limits 24-44
Working with Destination Controls 24-44
Bounce Verification 24-51
Overview: Tagging and Bounce Verification 24-52
Accepting Legitimate Untagged Bounced Messages 24-53
Preventing a Bounced Message Storm Using Bounce Verification 24-54
Set Email Delivery Parameters 24-56
Default Delivery IP Interface 24-56
Possible Delivery Feature 24-56
Default Maximum Concurrency 24-57
deliveryconfig Example 24-57
Configuring Mail Gateways for all Hosted Domains Using Virtual Gateway™ Technology 24-59
Overview 24-60
Setting Up Virtual Gateway Addresses 24-60
Monitoring the Virtual Gateway Addresses 24-68
Managing Delivery Connections per Virtual Gateway Address 24-68
Using Global Unsubscribe 24-69
Adding a Global Unsubscribe Address Using The CLI 24-70
Exporting and Importing a Global Unsubscribe File 24-72