Cisco Cisco Email Security Appliance C170 Release Notes

80072

When processing a message, the Email Security appliance performs feature key 
checks when running certain filter rules. The performance of these feature key checks 
slowed down in AsyncOS 7.5.0 and caused a slowdown in processing messages 
through the email pipeline. This issue has been resolved.

80678 

Fixed: Infrequent Race Condition Could Lock Up Email Security Appliance 

When this issue occurred, the Email Security appliance stopped communicating with 
associated Security Management appliances, and stopped responding to input via GUI 
and CLI. 

79524 

Fixed an issue where adding a footer to an outgoing message or stripping an outgoing 
message’s attachment would result in excessive memory usage on the Email Security 
appliance.

74547

The content scanning engine in AsyncOS 7.5.0 for Email improved performance from 
previous versions but it would run out of memory when scanning certain types of 
vCard attachments. When it reached its memory limit, the engine restarted and the 
message and its attachment continued through the work queue. This issue has been 
resolved.

76228

Previously, if the Email Security appliance tried delivering large messages to a 
destination that could not be reached, the message queue would fill up messages and 
stop accepting new messages. The queue would then force the appliance into 
“resource conservation” mode because the queue would not release the memory it was 
using, which prevented the appliance from running tasks like garbage collection. This 
issue has been resolved.

79854

Fixed an issue where a recipient was unable to reply to a message that had been 
encrypted using the Cisco Registered Envelope Service.