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 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.