Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

SMTP Authentication can also be used to provide validation for an outbound mail relay, using a 
username and password. Create an ‘outgoing’ SMTP authentication profile and then attach the profile to 
an SMTP route for the ALL domain. On each mail delivery attempt, the appliance will log on to the 
upstream mail relay with the necessary credentials. SMTP authentication supports the following 
authorization protocols: PLAIN and LOGIN.

Create an outgoing SMTP authentication profile.

Choose Network > SMTP Authentication. 

Click Add Profile. 

Enter a unique name for the SMTP authentication profile. 

For the Profile Type, select Outgoing. 

Click Next.

Enter an authentication username and password for the authentication profile. 

Click Finish. 

Configure SMPT routes to use the outgoing SMTP authentication profile that you created in 

.

Choose Network > SMTP Routes. 

Click the All Other Domains link in the Receiving Domain column of the table. 

Enter the name of the Destination Host for the SMTP route. This is the hostname of your external 
mail relay used to deliver outgoing mail.

Select the outgoing SMTP authentication profile from the drop-down menu. 

Submit and commit your changes.

Enable SMTP authentication in the Mail Flow Policy.

Choose Mail Policies > Mail Flow Policies.

Select the intended outbound listener.

Click Default Policy Parameters and scroll down to the Security Features > Encryption and 
Authentication section.

Select Required for SMTP Authentication.

Submit and commit your changes.

The following events will be logged in the mail logs when the SMTP Authentication mechanism (either 
LDAP-based, SMTP forwarding server based, or SMTP outgoing) is configured on the appliance: 

[Informational] Successful SMTP Authentication attempts — including the user authenticated and 
the mechanism used. (No plaintext passwords will be logged.)