During ENE integration you should specify the Fully Qualified Domain Name (FQDN) of the Simple Mail Transfer Protocol (SMTP) Gateway server.
During ENE integration you should specify the Fully Qualified Domain Name (FQDN) of the Simple Mail Transfer Protocol (SMTP) Gateway server.
During ENE integration, specifying the Fully Qualified Domain Name (FQDN) of the Simple Mail Transfer Protocol (SMTP) Gateway server is essential for properly routing emails through the network. FQDN provides the exact location of the server in the DNS hierarchy, ensuring accurate communication with the SMTP server.
https://docs.cyberark.com/Product-Doc/OnlineHelp/PAS/11.6/en/Content/PASIMP/Event-Notification-Engine.htm
you need the IP address, not the FQDN
The correct is A.
B is correct answer.