IronPort - advanced configuration guide

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CHAPTER
2
Configuring Routing and Delivery Features
This chapter explains the features that affect routing and delivery of email traveling through the Cisco
IronPort appliance. After you have configured the gateway to receive email with listeners, you can
further tailor the configuration of the routing and delivery that the appliance performs, for both inbound
(receiving email from the Internet) and outbound (sending email from your internal systems) processing.
This chapter contains the following sections:
Routing Email for Local Domains, page 2-1 (SMTP Routes page and smtproutes command)
Rewriting Addresses, page 2-7
Creating Alias Tables, page 2-8 (aliasconfig command)
Configuring Masquerading, page 2-16 (masquerade subcommand)
The Domain Map Feature, page 2-28 (domainmap subcommand)
Directing Bounced Email, page 2-35 (Bounce Profiles and the bounceconfig command)
Controlling Email Delivery, page 2-44 (Destination Controls and the destconfig and
deliveryconfig commands)
Cisco IronPort Bounce Verification, page 2-53
Set Email Delivery Parameters, page 2-57
Using Virtual Gateway Technology, page 2-59 (altsrchost command)
Using Global Unsubscribe, page 2-69 (unsubscribe command)
Routing Email for Local Domains
In Chapter 1, “Customizing Listeners” you customized private and public listeners to service SMTP
connections for an Enterprise Gateway configuration. Those listeners were customized to handle specific
connections (via HAT modification) and receive mail for specific domains (via RAT modification of
public listeners).
The Cisco IronPort appliance routes mail to local domains to hosts specified via the Network > SMTP
Routes page (or the smtproutes command). This feature is similar to the sendmail mailertable feature.
Note If you have completed the GUI’s System Setup Wizard (or the Command Line Interface systemsetup
command) as described in the “Setup and Installation” chapter of the Cisco IronPort AsyncOS for Email
Configuration Guide and committed the changes, you defined the first SMTP route entries on the
appliance for each RAT entry you entered at that time.
Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide
2-1