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

Answer options:

A. Confirm the email server configuration and reinstall the email server software.
B. Validate TLS certificates on the destination email gateway.
C. Confirm email encryption service.
D. Consult the cloud vendor`s anti-spam policy.

A