Which action is a valid fallback when a client certificate is unavailable during SMTP authentication on Cisco ESA?
A network administrator notices that there are a high number of queries to the LDAP server. The mail logs show an entry "550 Too many invalid recipients | Connection closed by foreign host." Which feature must be used to address this?
A Cisco ESA administrator has noticed that new messages being sent to the Centralized Policy Quarantine are being released after one hour. Previously, they were being held for a day before being released.
What was configured that caused this to occur?
An administrator identifies that, over the past week, the Cisco ESA is receiving many emails from certain senders and domains which are being consistently quarantined. The administrator wants to ensure that these senders and domain are unable to send anymore emails.
Which feature on Cisco ESA should be used to achieve this?
Which feature utilizes sensor information obtained from Talos intelligence to filter email servers connecting into the Cisco ESA?
