User Guide

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AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 3 Setup and Installation
Using the System Setup Wizard
Relaying Mail (Optional)
When configuring your interfaces to relay mail, you define the systems allowed to relay email through
the appliance.
These are entries in the RELAYLIST of the Host Access Table for a listener. See Sender Group Syntax,
page 7-4 for more information.
Mark the check box for Relay Outgoing Mail to configure the interface to relay mail. Enter the hosts that
may relay mail through the appliance.
When you configure an interface to relay outbound mail, the System Setup Wizard turns on SSH for the
interface as long as no public listeners are configured to use the interface.
In the following example, two interfaces with IPv4 addresses are created:
• 192.168.42.42 remains configured on the Management interface.
• 192.168.1.1 is enabled on the Data 1 Ethernet interface. It is configured to accept mail for domains
ending in .example.com and an SMTP route is defined for exchange.example.com.
• 192.168.2.1 is enabled on the Data 2 Ethernet interface. It is configured to relay mail from
exchange.example.com.
Note The following example pertains to the following appliances only: C370, C670, X1070, C380, C680,
C390, and C690. For C170 and C190 appliances, the Data 2 interface is typically configured for both
incoming and outgoing mail while the Data 1 interface is used for appliance management (see C170 and
C190 Installations, page 3-21).
Figure 3-3 Network Interfaces: 2 Interfaces in Addition to Management (Segregated Traffic)
C170 and C190 Installations
When configuring a single IP address for all email traffic (nonsegregated traffic), step 3 of the System
Setup Wizard will look like this (the appliance image shown in the wizard reflects your model):