Cisco Cisco Email Security Appliance C170

This section is relevant only if you were using previous versions of AsyncOS for Email. 

 lists the issues that were resolved in version 7.8 of AsyncOS for Email. Click a Defect ID in the 

table for more information about the defect.

 lists the known issues in this release of AsyncOS for Email.

Temporary directories are not cleanly removed when upgrading the Reputation 
Engine.

Intermittent application fault with certain SSL/TLS connections.

NIC addresses obtained from 

snmpwalk

 and 

ipcheck

 commands are different. 

Updated MTU is not displayed in 

ifconfig

 when MTU of an interface is updated 

using 

etherconfig

 command.

SNMP trap interface index incorrectly identifying interface.

CSCzv54743 Network configuration lost while reverting back after an AsyncOS for Email 

You will lose the network configuration of your Email Security appliance if you are 
reverting back after an AsyncOS for Email upgrade. If you lose the network 
configuration, emails are not delivered until you reset the network configuration by 
physically accessing the Email Security appliance. This is observed when you upgrade 
AsyncOS for Email from version 7.5.2-203 to 7.6.3-019, and revert back to version 
7.5.2-203.

CSCzv39735 Appliance Misses Incoming Connections When Handling Large Messages

The Email Security appliance may not pick up an incoming connection when it’s 
processing a very large message (e.g., greater than 30 MB).

CSCzv41250 Message Tracking Returning Messages with a High Number of Recipients Results 

The Email Security appliance may run out of memory if you run a Message Tracking 
query in the Web UI that returns messages that have a large number of recipients.