FORTINET-FortiMail 5.3.8 Specialist

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.)

A FortiMail is configured with the protected domain "example.com". For this FortiMail, which of the following envelope addresses are considered incoming? (Choose two.)