A cloud engineer deployed an email server in a public cloud. Users can access the email server, but the emails they send cannot reach their destinati

ons. Which of the following should the cloud engineer do FIRST?

A. Confirm the email server configuration and reinstall the email server software.

B. Validate the security certificate for the email domain.

C. Confirm email encryption service.

D. Consult t

he cloud vendor-s anti-spam policy.