Cisco Cisco Email Security Appliance C190 Guía Del Usuario
7-11
Cisco AsyncOS 8.0.1 for Email User Guide
Chapter 7 Defining Which Hosts Are Allowed to Connect Using the Host Access Table (HAT)
Understanding Predefined Sender Groups and Mail Flow Policies
Understanding Predefined Sender Groups and Mail Flow
Policies
Policies
listener is created.
Table 7-6
Predefined Sender Groups and Mail Flow Policies for Public Listeners
Predefined Sender Group
Description
Default Configured
Mail Flow Policy
Mail Flow Policy
WHITELIST
Add senders you trust to the Whitelist sender
group. The $TRUSTED mail flow policy is
configured so that email from senders you trust
has no rate limiting enabled, and the content from
those senders is not scanned by the Anti-Spam or
Anti-Virus software.
group. The $TRUSTED mail flow policy is
configured so that email from senders you trust
has no rate limiting enabled, and the content from
those senders is not scanned by the Anti-Spam or
Anti-Virus software.
$TRUSTED
BLACKLIST
Senders in the Blacklist sender group are rejected
(by the parameters set in the $BLOCKED mail
flow policy). Adding senders to this group rejects
connections from those hosts by returning a 5XX
SMTP response in the SMTP HELO command.
(by the parameters set in the $BLOCKED mail
flow policy). Adding senders to this group rejects
connections from those hosts by returning a 5XX
SMTP response in the SMTP HELO command.
$BLOCKED
SUSPECTLIST
The Suspectlist sender group contains a mail flow
policy that throttles, or slows, the rate of incoming
mail. If senders are suspicious, you can add them
to the Suspectlist sender group, where the mail
flow policy dictates that:
policy that throttles, or slows, the rate of incoming
mail. If senders are suspicious, you can add them
to the Suspectlist sender group, where the mail
flow policy dictates that:
•
Rate limiting limits the maximum number of
messages per session, the maximum number
of recipients per message, the maximum
message size, and the maximum number of
concurrent connections you are willing to
accept from a remote host.
messages per session, the maximum number
of recipients per message, the maximum
message size, and the maximum number of
concurrent connections you are willing to
accept from a remote host.
•
The maximum recipients per hour from the
remote host is set to 20 recipients per hour.
Note that this setting is the maximum
throttling available. You can increase the
number of recipients to receive per hour if this
parameter is too aggressive.
remote host is set to 20 recipients per hour.
Note that this setting is the maximum
throttling available. You can increase the
number of recipients to receive per hour if this
parameter is too aggressive.
•
The content of messages will be scanned by
the anti-spam scanning engine and the
anti-virus scanning engine (if you have these
feature enabled for the system).
the anti-spam scanning engine and the
anti-virus scanning engine (if you have these
feature enabled for the system).
•
The Cisco SenderBase Reputation Service
will be queried for more information about
the sender.
will be queried for more information about
the sender.
$THROTTLED