Cisco Cisco Email Security Appliance C160 Mode D'Emploi

If you are entering an existing key, simply paste it into the form. Another way to 
use existing signing keys is to import the key as a text file. For more information 
about adding existing signing keys, see 

Once a key is entered, it is available for use in domain profiles, and will appear in 
the Signing Key list in the domain profile:

You can export your signing keys to a text file on the Cisco IronPort appliance. 
When you export keys, all of the keys currently existing on the appliance are put 
into a text file. For more information about exporting keys, see 

You can import keys that have been exported as well.

Importing keys causes all of the current keys on the appliance to be replaced.