An SMTP client successfully authenticates with a FortiMail unit with no access list entries configured. Which of the following statements correctly describes the expected behavior of the FortiMail unit in this scenario?

The FortiMail unit will relay all email messages from the authenticated client.

The FortiMail unit will deny relaying the email message and will send an SMTP 550 error to the authenticated client.

The FortiMail unit will only relay email messages from the authenticated client to recipients on the FortiMail unit's protected email domains.

The FortiMail unit will discard all email messages from the authenticated client.