Cisco Cisco Email Security Appliance C190 Guia Do Utilizador

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Cisco IronPort AsyncOS 7.5 for Email Advanced Configuration Guide
OL-25137-01
Chapter 4      Validating Recipients Using an SMTP Server
Enabling the SMTP Call-Ahead Server Profile on a 
Public Listener
Once you create the SMTP Call-Ahead Server Profile, you need to enable it on a 
listener to allow the listener to validate incoming mail via the SMTP server. 
SMTP call-ahead functionality is only available on public listeners, as recipient 
validation is not necessary for private listeners.
To enable an SMTP Call-Ahead Server Profile on a listener:
Step 1
Go to Network > Listeners.
Step 2
Click the name of the listener where you want to enable SMTP call-ahead 
functionality.
The Edit Listener page opens.
Step 3
In the SMTP Call Ahead Profile field, select the SMTP Call-Ahead profile you 
want to enable.