Cisco CCNP Security 300-720 Question # 10 Topic 2 Discussion

The allow list is a feature that allows Cisco ESA to accept messages from specific email addresses or domains, regardless of their sender-based reputation score or other reputation filters.

To allow inbound email from that specific domain, the administrator should add the domain into the allow list on Cisco ESA, which can be done from the web user interface by selecting Security Services > Safelist/Blocklist and clicking Add Entry.

The other options are not valid solutions to allow inbound email from that specific domain, because they do not affect the sender-based reputation score or the reputation filters on Cisco ESA.

References: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 6-13 and page 6-14.