Cisco Cisco Email Security Appliance C170

 

URL filtering

URL filtering obtains the reputation and category of URLs in incoming and 
outgoing messages to allow several new functionalities: 

Anti-spam and outbreak filters now use the reputation and category of 
URLs in messages to help determine if a message is spam or malicious. 
This additional data improves the filtering accuracy for messages that 
contain URLs. 

You can further reduce the threat from potentially malicious sites by 
modifying URLs in delivered messages. You can make URLs 
unclickable, replace them with text, or redirect them to a proxy that 
evaluates the safety of a site if and when the recipient clicks the link, and 
blocks transactions it deems unsafe. You can create content and message 
filters to modify URLs based on categories of URL that are likely to be 
problematic. 

You can create content and message filters to enforce acceptable use 
policies based on the category of URLs in messages. For example, you 
can drop messages that include links in the Illegal Activities category. 

For more information, see the Documentation Updates section below and the 
new URL Filtering chapter in the user guide or online help. 

DMARC Verification

You can now:

Verify incoming emails using DMARC.

Define policies to override (accept, quarantine, or reject) domain 
owners’ policies.

Send DMARC aggregate feedback reports to domain owners that helps 
to strengthen their authentication deployments.

Send delivery error reports to the domain owners if the DMARC 
aggregate report size exceeds 10 MB or the size specified in the RUA tag 
of DMARC record.

Rule for detecting high 
volume mail attacks

AsyncOS now includes a new rule, Header Repeats (

header-repeats

) rule, 

for detecting high volume mail attacks. When used in message filters, the 
Header Repeats rule evaluates to 

true

 if at a given point in time, a specified 

number of messages:

With same subject are detected in the last one hour.

From same envelope sender are detected in the last one hour.

Upgrade notification

A notification now appears at the top of the web interface when a new 
AsyncOS upgrade is available.