Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
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AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 31 Spam Quarantine
Using Safelists and Blocklists to Control Email Delivery Based on Sender
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user@[ipv6:2001:db8::1]
An identical entry, such as a sender address or a domain, cannot be included on both the safelist and the
blocklist at the same time. However, a domain can be on a safelist while an email address for a sender
belonging to that domain is on the blocklist (or vice versa), and both rules apply. For example, if
example.com is on the safelist, george@example.com can be on the blocklist. In this case, the appliance
delivers all mail from example.com without scanning for spam, except mail from george@example.com,
which is treated as spam.
blocklist at the same time. However, a domain can be on a safelist while an email address for a sender
belonging to that domain is on the blocklist (or vice versa), and both rules apply. For example, if
example.com is on the safelist, george@example.com can be on the blocklist. In this case, the appliance
delivers all mail from example.com without scanning for spam, except mail from george@example.com,
which is treated as spam.
It is not possible allow or block a range of subdomains using the following syntax: .domain.com.
However, it is possible to block a specific domain using the following syntax: server.domain.com.
However, it is possible to block a specific domain using the following syntax: server.domain.com.
Clearing All Safelists and Blocklists
If you need to delete all safelist and blocklist entries, including all senders and all recipients, import a
file with no entries using the procedure in
file with no entries using the procedure in
About End-User Access to Safelists and Blocklists
End users access their safelist and blocklist via the spam quarantine. To configure end-user access to the
spam quarantine, see
spam quarantine, see
.
You may want to give your end users the URL of the spam quarantine and the instructions below, as
applicable.
applicable.
Related Topics
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Adding Entries to Safelists (End Users)
Note
Delivery of messages from safelisted senders depends on other settings that are configured in the system.
See
See
.
End users can add senders to safelists in two ways:
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•
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 spam quarantine.
Procedure
Step 1
From the spam quarantine, select the checkbox next to the message.
Step 2
Choose Release and Add to Safelist from the drop-down menu.