Cisco Cisco Email Security Appliance C160 ユーザーガイド
1-5
Cisco AsyncOS 8.5.6 for Email User Guide
Chapter 1 Getting Started with the Cisco Email Security Appliance
What’s New in This Release
New Features in Release 8.5.0
Feature
Description
New Features
DMARC
Verification
Verification
AsyncOS for Email now allows you to:
•
Verify incoming emails using DMARC.
•
Define policies to override (accept, quarantine, or reject) domain owners’
policies.
policies.
•
Send DMARC aggregate feedback reports to domain owners that helps to
strengthen their authentication deployments.
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.
report size exceeds 10 MB or the size specified in the RUA tag of DMARC
record.
Rule for
detecting high
volume mail
attacks
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
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
notification
A notification now appears at the top of the web interface when a new AsyncOS
upgrade is available. See
upgrade is available. See
.
Virtual appliance
support
support
•
The following deployment options are now supported:
–
Deployments with VMWare ESXi5.1 hypervisor
–
Deployment as part of a FlexPod solution
For general information about FlexPod, see
.
•
Virtual license expiration now includes a 180-day grace period, during which
the appliance continues to deliver mail without security services.
the appliance continues to deliver mail without security services.
Option to drop an
email with
corrupt
attachment
email with
corrupt
attachment
You can now configure your content filters to drop emails containing corrupt
attachments. See
attachments. See
.