I have a mail server on an external IP address and fortigate blocks the
address almost every day and messages cannot be sent or received. The
mail server then works normally. Was created a policy on the firewall
does not help, still the address is bl...
The mail server is off-network hosted by another company. Users connect
to it via Outlook and send and receive messages from there, they do not
use a VPN and there are no port forwarding configured
