Cisco Cisco Email Security Appliance C670 Release Notes

If you previously used a custom notification template, headers were included by 
default. When you upgrade to AsyncOS version 5.0 or later, notification templates 
do not include headers by default. To include headers, you can add the 

$allheaders 

message filter action variable. [Defect ID: 27710]

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]

For the AsyncOS 7.1.2 release, please use the following instructions to upgrade 
your Email Security appliance.

Save the XML configuration file off the IronPort appliance. 

If you are using the Safelist/Blocklist feature, export the Safelist/Blocklist 
database off the IronPort appliance. 

Suspend all listeners.