Email encryption is configured on a Cisco ESA that uses CRES.
Which action is taken on a message when CRES is unavailable?

An organization wants to use DMARC to improve its brand reputation by leveraging DNS records.
Which two email authentication mechanisms are utilized during this process? (Choose two.)
What is the default HTTPS port when configuring spam quarantine on Cisco ESA?
An engineer is configuring an SMTP authentication profile on a Cisco ESA which requires certificate verification.
Which section must be configured to accomplish this goal?
Which setting affects the aggressiveness of spam detection?