Cisco Cisco Email Security Appliance C170

You can now access the Sender Group report directly from the Monitor menu; the link has been removed 
from the bottom of the Incoming Mail report page. 

Feature key is no longer required to enable Centralized Management feature. By default, Centralized 
Management feature is enabled on your appliance.

Prior to this release, Email Security appliance enters resource conservation mode when the RAM 
utilization exceeds 75% and the allowed injection rate is gradually decreased as RAM utilization 
approaches 85%. 

From version 8.0 onwards, AsyncOS for Email is a 64-bit software. As a result of this changed memory 
model, the threshold values are revised in this release. Appliance enters resource conservation mode 
when the RAM utilization exceeds 45% and the allowed injection rate is gradually decreased as RAM 
utilization approaches 60%. This change does not affect the memory utilization on the appliance and all 
the components in the appliance continue to use the memory as earlier.

Appliances with large memory utilization, especially with large system quarantine, can enter resource 
conservation immediately after upgrading to this release. To avoid this scenario, make sure that you 
reduce the system quarantine to a few thousand messages before upgrading.