Cisco Cisco Email Security Appliance C160 Mode D'Emploi

On the Mail Flow Policies page (from the Mail Policies menu), click on the RELAYED mail flow policy 
(outgoing).

From the Security Features section, enable DomainKeys/DKIM Signing by selecting On.

Submit and commit your changes.

In addition to signing outbound messages, you may want to sign bounce and delay messages. You may 
want to do this to alert recipients that the bounce and delay messages they receive from your company 
are legitimate. To enable DomainKeys and DKIM signing for bounce and delay messages, you enable 
DomainKeys/DKIM signing for the bounce profile associated with the public listener.

On the bounce profile associated with the public listener where you will send signed outbound messages, 
go to Hard Bounce and Delay Warning Messages. 

Enable “Use Domain Key Signing for Bounce and Delay Messages”:

You must have completed all steps listed in 

to sign bounced and delay messages. 

The From: address in the domain profile must match the address used for the bounce return address. To 
ensure these addresses match, you can configure a return address for the bounce profile (System 
Administration > Return Addresses), and then use the same name in the Profile Users list in the domain 
profile. For example, you would configure a return address of MAILER-DAEMON@example.com for 
the bounce return address, and add MAILER-DAEMON@example.com as a profile user in the domain 
profile. 

Create a new or import an existing private key. For information on creating or importing signing keys, 
see 

.

Create a domain profile and associate the key with the domain profile. For information on creating a 
domain profile, see 

.

Create the DNS text record. For information about creating the DNS text record, see