Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
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Cisco AsyncOS 9.1 for Email User Guide
Chapter 31 Spam Quarantine
Using Safelists and Blocklists to Control Email Delivery Based on Sender
blocklist action is configured to quarantine, the message is scanned and eventually quarantined. If the
blocklist action is configured to delete, the message is dropped immediately after safelist/blocklist
scanning.
blocklist action is configured to delete, the message is dropped immediately after safelist/blocklist
scanning.
Because safelists and blocklists are maintained in the spam quarantine, delivery behavior is also
contingent on other anti-spam settings. For example, if you configure the “Accept” mail flow policy in
the Host Access Table (HAT) to skip anti-spam scanning, then users who receive mail on that listener
will not have their safelist and blocklist settings applied to mail received on that listener. Similarly, if
you create a mail flow policy that skips anti-spam scanning for certain message recipients, these
recipients will not have their safelist and blocklist settings applied.
contingent on other anti-spam settings. For example, if you configure the “Accept” mail flow policy in
the Host Access Table (HAT) to skip anti-spam scanning, then users who receive mail on that listener
will not have their safelist and blocklist settings applied to mail received on that listener. Similarly, if
you create a mail flow policy that skips anti-spam scanning for certain message recipients, these
recipients will not have their safelist and blocklist settings applied.
Related Topics
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Enabling Safelists and Blocklists
Before You Begin
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The spam quarantine must be enabled. See
.
Procedure
Step 1
Select Monitor > Spam Quarantine.
Step 2
In the End-User Safelist/Blocklist (Spam Quarantine) section, select Enable.
Step 3
Select Enable End User Safelist/Blocklist Feature.
Step 4
Select Quarantine or Delete for the Blocklist Action.
Step 5
Specify the Maximum List Items Per User.
This is the maximum number of addresses or domains for each list, for each recipient. If you allow a
large number of list entries per user, system performance might be adversely affected.
large number of list entries per user, system performance might be adversely affected.
Step 6
Submit and commit your changes.
External Spam Quarantine and Safelist/Blocklists
If you use an external spam quarantine on a Security Management appliance, the safelist/blocklist is
saved on the management appliance. This gives you a single location to manage safe and blocked senders
for all appliances.
saved on the management appliance. This gives you a single location to manage safe and blocked senders
for all appliances.
Because the Email Security appliance evaluates senders in safelists and blocklists when processing
incoming mail, safelists and blocklists that are stored on a Security Management appliance must be sent
to the Email Security appliance in order to be applied to incoming mail. When you configure the
safelist/blocklist feature on a Security Management appliance, you configure the frequency of these
updates.
incoming mail, safelists and blocklists that are stored on a Security Management appliance must be sent
to the Email Security appliance in order to be applied to incoming mail. When you configure the
safelist/blocklist feature on a Security Management appliance, you configure the frequency of these
updates.
For more information about working with external safelists and blocklists on a Security Management
appliance, see the topics under
appliance, see the topics under
Cisco Content Security Management Appliance User Guide.