Cisco Cisco Email Security Appliance C160 Mode D'Emploi

The Email Security appliance can append a disclaimer message above the heading of a suspicious 
message to warn the user of its content. This disclaimer can be in HTML or plain text, depending on the 
type of message.

Select the disclaimer text you want to use from the Threat Disclaimer list or click the Mail Policies > 
Text Resources link to create a new disclaimer using the Disclaimer Template. The Disclaimer Template 
includes variables for outbreak threat information. You can see a preview of the threat disclaimer by 
clicking Preview Disclaimer. For custom disclaimer messages, you can use variables to display the threat 
level, the type of threat, and a description of the threat in the message. For information on creating a 
disclaimer message, see 

Messages quarantined by the Outbreak Filters feature are sent to the Outbreak quarantine. This 
quarantine functions like any other quarantine (for more information about working with quarantines, 
see 

) except that it has a “summary” view, useful 

for deleting or releasing all messages from the quarantine, based on the rule used to place the message 
in the quarantine (for Outbreak Rules, the Outbreak ID is shown, and for Adaptive Rules, a generic term 
is shown). For more information about the summary view, see 

. 

Though a properly configured quarantine requires little if any monitoring, it is a good idea to keep an 
eye on the Outbreak Quarantine, especially during and after virus outbreaks when legitimate messages 
may be delayed.

If a legitimate message is quarantined, one of the following occurs depending on the settings for the 
Outbreak quarantine:

If the quarantine’s Default Action is set to Release, the message will be released when the retention 
time period expires or when the quarantine overflows. You can configure the Outbreak quarantine 
so that the following actions are performed on messages before they are released due to overflow: 
strip attachments, modify the subject, and add an X-Header. For more information about these 
actions, see 

.

If the quarantine’s Default Action is set to Delete, the message will be deleted when the retention 
time period expires, or when the quarantine overflows.

Overflow occurs when the quarantine is full and more messages are added. In this case the messages 
closest to their expiration date (not necessarily the oldest messages) are released first, until enough 
room is available for the new messages. You can configure the Outbreak quarantine so that the 
following actions are performed on messages before they are released due to overflow: strip 
attachments, modify the subject, add an X-Header. 

Because quarantined messages are rescanned whenever new rules are published, it is very likely that 
messages in the Outbreak quarantine will be released prior to the expiration time.

Still, it can be important to monitor the Outbreak quarantine if the Default Action is set to Delete. Cisco 
recommends most users to not set the default action to Delete. For more information about releasing 
messages from the Outbreak quarantine, or changing the Default Action for the Outbreak Quarantine, 
see