Cisco Cisco Email Security Appliance X1070 릴리즈 노트

If you are monitoring Email Security appliances using SNMP, the number of open 
files will increase to around 2500 after upgrading the appliance to AsyncOS 7.5.1. 

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.

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 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]