Cisco Cisco Email Security Appliance C190 Guía Del Usuario

The IronPort Email Encryption Settings page displays the current versions of the 
PXE engine and the Domain Mappings file used by your appliance. In previous 
versions of AsyncOS, you had to update AsyncOS in order to update the PXE 
engine. Now, you can use the Security Services > Service Updates page (or the 

updateconfig

 command in the CLI) to configure the IronPort appliance to 

automatically update the PXE engine. For more information, see 

You can also manually update the engine using the Update Now button of the 
PXE Engine Updates section of IronPort Email Encryption Settings page (or the 

encryptionupdate

 command in the CLI).

After you create an encryption profile, you need to create an outgoing content 
filter that determines which email messages should be encrypted. The content 
filter scans outgoing email and determines if the message matches the conditions 
specified. Once the content filter determines a message matches the condition, the 
IronPort Email Security appliance encrypts the message and sends the generated 
key to the key server. It uses settings specified in the encryption profile to 
determine the key server to use and other encryption settings.

Based on the destination controls specified for a domain, your IronPort appliance 
can securely relay a message over a TLS connection instead of encrypting it, if a 
TLS connection is available. The appliance decides whether to encrypt the