A FortiMail administrator is investigating a sudden increase in DSNs being delivered to the protected domain for undeliverable email messages. After searching the logs, the administrator identifies that the DSNs were not generated as a result of any outbound email sent from the protected domain. Which FortiMail antispam technique can the administrator use to prevent this scenario? (Choose one.)
yigiton
4 years, 4 months agokinge2
4 years, 9 months ago