To investigate the issue and identify the root cause
Login https://TPAM-IP/admin/ManageAlertReceivers.asp
1.If an existing email alert notification is already configured, please "Send Test Message" email. Check if the intended recipient received the Test Message.
2. If no existing email alert is configured, please create a fake alert and send a test email.
Screen shot the full error message when sending a test email or the error in the test email message.