A server administrator needs to configure iDRAC to send email alerts. When the administrator runs a test, the error "Sending the test mail failed" is returned.
The administrator enables platform event filter alerts and configures the following settings:
IP: 172.168.1.10/24
Gateway: 172.16.1.1
DNS: 172.168.1.100
SMTP: 172.168.1.5
Destination email address (enabled): administrator@example com
The administrator has NOT made any other changes to iDRAC.
What should the administrator do to correct the issue?