Cisco Cisco Email Security Appliance X1070 Release Notes
2
Release Notes for Cisco AsyncOS 8.5 for Email
What’s New
What’s New
Feature
Description
New Features
URL filtering
URL filtering obtains the reputation and category of URLs in incoming and
outgoing messages to allow several new functionalities:
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.
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.
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.
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.
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.
owners’ policies.
•
Send DMARC aggregate feedback reports to domain owners that helps
to strengthen their authentication deployments.
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.
aggregate report size exceeds 10 MB or the size specified in the RUA tag
of DMARC record.
Rule for detecting high
volume mail attacks
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
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.
AsyncOS upgrade is available.