Cisco Cisco Email Security Appliance C690

For DKIM Authentication, IronPort currently supports version 8 of the Draft 
Specification of ‘Authentication-Results:’ header.

For SPF/SIDF verification, the 

spf-passed

 rule is no longer available in content 

filters. To maintain backwards compatibility, the 

spf-passed

 content filter rule 

will be accepted from XML configuration files but it will be converted to the 

spf-status

 rule with corresponding arguments. 

spf-passed

 will be changed to 

spf-status == "Pass"

 and NOT spf-passed to 

spf-status != "Pass"

. You can, 

however, still use the 

spf-passed

 message filter.

When you configure AsyncOS to use received headers, you can specify that the 
header reflects one of the following hostnames:

The hostname of the Virtual Gateway used for delivering the message

The hostname of the interface the message is received on

You specify the hostname from the CLI command 

listenerconfig-> setup

. You 

cannot configure the hostname from the GUI.

If you configure the received header to display the hostname of the interface the 
message is received on, a 

strip-header

 filter action configured to strip received 

headers will strip the received header inserted by AsyncOS. [Defect IDs: 16254, 
25816] 

The AsyncOS appliance checks for and applies feature keys at one minute 
intervals. Therefore, when you add a feature key, it may take up to a minute to 
view the changes. [Defect ID: 29160]

Appliances cannot be upgraded to the AsyncOS 7.3 for Email release.