This is translated by Google:
It looks like a firewall issue. Make sure there is a firewall rule allowing HTTPS/443 from Brightmail to the Internet.
Parece un problema de cortafuegos. Asegúrese de que hay una regla de firewall que permite HTTPS/443 de Brightmail a Internet.
Network error occurred, SSL read: error:00000000:lib(0):func(0):reason(0),
errno 104 (56), check your network connection settings, check your proxy settings
(if applicable), and check to ensure that port 443 (HTTPS) is open through any relevant firewalls.
Your license file is expiring. You can get a trial license from the Symantec Site.
Su archivo de licencia va a expirar. Usted puede obtener una licencia de prueba desde el sitio de Symantec
http://www.symantec.com/business/products/trialware.jsp?pcid=pcat_info_risk_comp&pvid=1721_1