FortiMail Cloud - Technical Documents

Hi all,

could you tell me where I can find technical documents related to the Cloud FortiMail solution?

How I have to change the MX Records (there is one FQDN, multiple FQDNs...), how does the mail flow is sent between mail server and FortiMail, if there is a list of public IP/Subnets in order to create the appropriate firewall policies in my infrastructure and so on.

Thanks in advance