Cisco Cisco Email Security Appliance C650 Guía Del Usuario

You can enable end users to create safelists and blocklists to better control which emails are treated as 
spam. Safelists allow a user to ensure that certain users or domains are never treated as spam, while 
blocklists ensure that certain users or domains are always treated as spam. The safelists and blocklists 
settings are configured from the Spam Quarantine, so you must enable and configure the Spam 
Quarantine to use this feature. When you enable the safelist/blocklist feature, each end user can maintain 
a safelist and blocklist for his or her email account. 

Safelists and blocklists prevent mail from being treated as spam or ensure that mail is treated as spam. 
However, a safelist or blocklist setting does not prevent the appliance from scanning an email for viruses 
or determining if the message meets the criteria for a content-related mail policy. If a message is part of 
a safelist, it may not be delivered to the end user depending on other scanning settings.

When a user adds an entry to a safelist or blocklist, the entry is stored in a database on the content 
security appliance. 

If you use a Cisco Content Security Management appliance, the database is saved on the Security 
Management appliance and periodically updated and synchronized on all related Email Security 
appliances. 

If the Spam Quarantine is hosted on an Email Security appliance, the safelist/blocklist database is 
maintained on that appliance. 

If you use multiple Email Security appliances without a Security Management appliance, you may 
need to synchronize databases and configuration settings manually. 

For information about synchronizing safelist/blocklist settings and databases across different Email 
Security appliances, see 

.

For information about working with the backup .CSV database, see 

For more information about working with safelists and blocklists on a Cisco Content Security 
Management appliance, see the Cisco Content Security Management Appliance User Guide.

The safelists and blocklists are created and maintained by end users. However, an administrator enables 
the feature and configures delivery settings for email messages matching entries in the blocklist. To 
create and maintain safelists and blocklists, the administrators and end-users complete the following 
tasks:

Administrator tasks. Administrators enable and configure the Spam Quarantine, enable the 
Safelist/Blocklist feature, backup and restore the Safelist/Blocklist database, synchronize the 
Safelist/Blocklist database between different appliances, and troubleshoot safelist and blocklist 
issues via logs, alerts, and custom headers. For more information about administrator tasks, see