Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
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Cisco AsyncOS 8.0.1 for Email User Guide
Chapter 27 Quarantines
Using Safelists and Blocklists to Control Email Delivery Based on Sender
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server.domain.com
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domain.com
End users cannot add a sender or domain to both safe and block lists at the same time. However, if the
end user adds a domain to a safelist, and the email address for a user of that domain to the blocklist (or
vice versa), the appliance applies both rules. For example, if the end user adds example.com to the
safelist, and adds george@example.com to the blocklist, the appliance delivers all mail from
example.com without scanning for spam, but will treat mail from george@example.com as spam.
end user adds a domain to a safelist, and the email address for a user of that domain to the blocklist (or
vice versa), the appliance applies both rules. For example, if the end user adds example.com to the
safelist, and adds george@example.com to the blocklist, the appliance delivers all mail from
example.com without scanning for spam, but will treat mail from george@example.com as spam.
End users cannot allow or block a range of sub-domains using the following syntax: .domain.com.
However, an end user can explicitly block a specific domain using the following syntax:
server.domain.com.
However, an end user can explicitly block a specific domain using the following syntax:
server.domain.com.
Adding Entries to Safelists
End users can add senders to safelists in two ways:
Adding the Sender of a Quarantined Message to the Safelist
End users can add senders to the safelist if the message has been sent to the end user quarantine.
Procedure
Step 1
From the End-User Quarantine, select the checkbox next to message.
Step 2
Choose “Release and Add to Safelist” from the drop-down menu.
The envelope sender and the from header for the specified mail are both added to the safelist, and the
released messages proceed directly to the destination queue, skipping any further work queue processing
in the email pipeline.
released messages proceed directly to the destination queue, skipping any further work queue processing
in the email pipeline.
Adding Senders to the Safelist Without a Quarantined Message
Procedure
Step 1
From the Spam Quarantine page, select the Options drop-down menu in the upper righthand corner.
Step 2
Choose Safelist.
Step 3
From the Safelist dialog box, enter the email address or domain. You can enter multiple domains and
email addresses, separated by commas.
email addresses, separated by commas.
Step 4
Click Add to List.
Adding Senders to Blocklists
When the appliance receives mail from the specified email address or domain that matches an entry in
the blocklist, it treats the mail as spam. The mail may be rejected or it may be quarantined, depending
on the safelist/blockist action settings.
the blocklist, it treats the mail as spam. The mail may be rejected or it may be quarantined, depending
on the safelist/blockist action settings.