What three configuration steps are required to enable DKIM signing for outbound messages on FortiMail?
(Choose three.)

While testing outbound MTA functionality, an administrator discovers that all outbound email is being processed using policy IDs 1:2:0.
Which two reasons explain why the last policy ID value is 0? (Choose two.)

Refer to the exhibit.

An administrator must enforce authentication on FML-1 for all outbound email from the example.com domain. Which two settings should be used to configure the access receive rule? (Choose two.)

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?

Which three statements about SMTPS and SMTP over TLS are true? (Choose three.)