Cisco Cisco Email Security Appliance C190 Release Notes

Support for 90-Series 
Hardware 

Support for new appliance models: 

C190

C390

C690 

Using From Header for 
DKIM Signing

You can now use the DKIM Global Settings (Mail Policies > Signing 
Profiles) to choose whether to use From header for DKIM signing. For 
DMARC verification of DKIM signed messages, you must use the From 
header during DKIM signing.

Duplicate Boundaries 
Verification

Cisco Email Security appliance can now detect messages with duplicate 
MIME boundaries and perform actions on them. 

Use the Duplicate Boundaries Verification content filter condition or the 

duplicate_boundaries

 message filter rule to detect messages with 

duplicate MIME boundaries.

The following message filter will quarantine all the messages that contain 
duplicate MIME boundaries.

DuplicateBoundaries: if (duplicate_boundaries) { 

quarantine("Policy"); }

URL Filtering 
Enhancement 

You can now configure the appliance not to replace the URLs within 
HREF tags with secure proxy URLs. However, if an end user clicks on 
these URLs, the end user will be redirected to the secure proxy. 

You can configure this option using the 

websecurityadvancedconfig

 

command in CLI (

websecurityadvancedconfig

 > 

Do you want to 

rewrite all URLs with secure proxy URLs? [Y]> n

). 

Message Filter Rule to 
Detect Malformed MIME 
Headers

You can now take actions on messages with malformed MIME headers 
using the new message filter rule: “

malformed-header

.” The following 

example shows how to quarantine all the messages with malformed MIME 
headers:

quarantine_malformed_headers: if (malformed-header) 

{

quarantine("Policy");

}