IronPort - advanced configuration guide

Chapter 4 Validating Recipients Using an SMTP Server
Configuring SMTP Call-Ahead Recipient Validation
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You configure SMTP call-ahead recipient validation by creating an STMP call-ahead profile and
enabling that profile on a public listener. The profile defines the behavior of the SMTP call-ahead
recipient validation feature — how you connect to the SMTP server, and what actions to take based on
the responses of the SMTP server. You assign this profile to a public listener to enable messages received
by the specified listener to be processed using SMTP call-ahead recipient validation.
To configure SMTP call-ahead recipient validation, complete the following steps:
1. Configure a Call-Ahead Server Profile. The Call-Ahead Server Profile specifies how to connect
to the call-ahead server and how to handle the call-ahead server responses. For more information,
see Configuring the Call-Ahead Server Profile, page 4-3.
2. Enable the Call-Ahead Server Profile on a Public Listener. Enabling the Call-Ahead Server
Profile on a public listener allows the Email Security appliance to process incoming mail on that
listener using SMTP call-ahead recipient validation. For more information, see Enabling the SMTP
Call-Ahead Server Profile on a Public Listener, page 4-6.
3. Configure your LDAP routing query settings. If you use an LDAP routing query to direct mail to
different hosts, you can configure a query to return SMTP call ahead server values for the SMTP
call-ahead query. See Configuring LDAP Routing Query Settings, page 4-7.
Configuring the Call-Ahead Server Profile
When you configure the SMTP Call-Ahead Server Profile, you specify the settings that determine how
the Email Security appliance connects with the SMTP server and how it interprets the responses sent
back from the SMTP server.
To configure the SMTP Call-Ahead Server Profile:
Step 1 Click Network > SMTP Call-Ahead.
The SMTP Call-Ahead Server Profile page opens.
Step 2 Click Add Profile.
The Add SMTP Call-Ahead Server Profile page opens.
Figure 4-2 Add SMTP Call-Ahead Server Profile page
Step 3 Enter the settings for profile. For more information, see Table 4-1SMTP Call-Ahead Server Profile
Settings, page 4-4.
Step 4 Configure the advanced settings for the profile. For more information, see Table 4-2SMTP Call-Ahead
Server Profile Advanced Settings, page 4-5.
Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide
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