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Safelists and blocklists are features on Cisco ESA that allow you to control email delivery based on the sender. Safelists are lists of sender addresses or domains that you want to accept or exempt from certain filtering actions.  Blocklists are lists of sender addresses o r domains that you want to reject or drop 3 . References =  Securing Email with Cisco Email Security Appliance (SESA) v3.1

Content filters are rules that allow Cisco ESA to perform actions on messages based on predefined or custom conditions, such as headers, envelope, body, attachments, etc.

The two primary components of content filters are:

Conditions, which are the criteria that determine whether a message matches a content filter rule or not, such as message size, sender address, attachment type, etc.

Actions, which are the operations that Cisco ESA performs on a message if it matches the conditions of a content filter rule, such as deliver, drop, quarantine, encrypt, etc.

The other options are not primary components of content filters on Cisco ESA.

A policy quarantine is a type of quarantine that allows Cisco ESA to store messages that match certain criteria, such as virus, spam, or DLP verdicts, for further review or release by an administrator or an end user.

A scenario that prevents a message from being sent to the quarantine as an action in the scan behavior on Cisco ESA is when a policy quarantine is missing, which means that no policy quarantine has been created or enabled on Cisco ESA.

The other options do not prevent a message from being sent to the quarantine as an action in the scan behavior on Cisco ESA.

Spam Quarantine End-User Authentication Query is a query that Cisco ESA performs against an LDAP server to validate the end-user credentials during login to the End-User Quarantine.

The safelist/blocklist (SLBL) is a feature that allows Cisco ESA to accept or reject messages from specific email addresses or domains, based on the configuration of mail flow policies or end user preferences.

The action that provides direct access to view the SLBL on Cisco ESA is to export the SLBL to a .csv file, which can be done from the web user interface by selecting Security Services > Safelist/Blocklist and clicking Export.

The other options do not provide direct access to view the SLBL on Cisco ESA.

Data Loss Prevention (DLP) is an outgoing mail policy feature that should be configured to catch this content before it leaves the network. DLP allows Cisco ESA to scan outgoing messages for sensitive or confidential data, such as credit card numbers, social security numbers, health records, etc., and apply appropriate actions, such as encrypt, quarantine, notify, etc., to prevent data leakage or loss.

The other options are not valid outgoing mail policy features to catch this content before it leaves the network, because they do not scan for sensitive or confidential data in messages.

Configuring the outbound firewall rule to permit traffic on port 3237 is the additional action that resolves the issue. AMP file reputation is a feature that allows Cisco ESA to check files attached to messages against a cloud-based database of known malicious files and apply appropriate actions, such as block, deliver, or quarantine.

By default, AMP file reputation uses TCP port 3237 to communicate with the cloud-based database. If this port is blocked by a firewall, AMP file reputation will not work properly.

To resolve this issue, the administrator can configure the outbound firewall rule to permit traffic on port 3237 from Cisco ESA.

The other options are not valid actions to resolve the issue, because they do not affect the port used by AMP file reputation.