Error: ‘License installation failed. Could not contact Symantec to register specified license file’ occurs when installing the SMS SMTP license file within the Control Center. How to resolve the issue and install the license file.
License installation fails.
SMS SMTP 5 system can successfully open a connection to 'register.brightmail.com' on port 443
Upon examining the license file, the expiration date has already passed. License file is expired
The license file attempting to be installed is expired. An expired license file will not activate/extend licensing dates within the SMS SMTP 5 software.
Delete any expired licenses.
Install a valid license file. License files can be obtained from Symantec’s Licensing Portal.