Question - FortiMail Cloud
Hi guys!
I've been looking into the cloud version of FortiMail appliance, but I've a question that I'm sure someone knows the answer (I'm sure it is a "easy" question).
Configuring the FortiMail Cloud is the same as configuring a physical / virtual appliance "in house" where the mail server is, the thing is, in this setup all the inbound SMTP traffic is port forwarded to the FortiMail before reaching the email server, causing 100% of the emails to pass by the FortiMail first.
But with FortiMail Cloud, although the MX Records will point to the cloud appliance, the mail server will have to be exposed to the internet in order to receive the inbound emails from the cloud appliance, making it possible for someone to deliver emails directly to the mail server, if they know the public IP. Is there any specific implementation setup recommended to avoid exposing the mail server to the internet? Or the only solution is using a firewall to only allow inbound SMTP traffic from the cloud appliance?
Thanks!