Cisco Cisco Email Security Appliance C170 發佈版本通知

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.

Cisco IronPort does not generally support the backward compatibility of configuration files with 
previous major releases. Minor release support is provided. Configuration files from previous versions 
may work with later releases; however, they may require modification to load. Check with Cisco IronPort 
Customer Support if you have any questions about configuration file support. 

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 7.6 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.

Wait for the queue to empty.

From the System Administration tab, select the System Upgrade page.