SMTP Port is a required mail configuration value for successful SMTP communication. IdentityIQ must know not only the mail server host but also the network port used to connect to that SMTP service. Common SMTP ports include 25, 465, or 587 depending on whether the environment uses unauthenticated SMTP relay, SSL/TLS, or STARTTLS. Without the port, IdentityIQ cannot reliably establish the socket connection to the mail server, even if the hostname and credentials are correct. Email notification is used heavily across IdentityIQ processes, including workflow approvals, certification reminders, lifecycle events, policy violations, provisioning notifications, and work-item escalation. Therefore, SMTP connectivity settings must be complete and accurate. SMTP Port is not merely cosmetic; it is part of the transport configuration required for IdentityIQ to communicate with the mail infrastructure. References/topics: IdentityIQ Engineer — email notification setup, SMTP server configuration, mail host and port, workflow and certification notifications.