Symantec Mail Security 8340. Software type: BoxSymantec Mail Security 8300 Series appliances deliver antispam, antivirus, and advanced content filtering technologies, available in either a physical or virtual appliance form factor, to protect against malicious threats, including inbound and outbound email and instant messaging borne threats. With structured data protection support, you can more effectively control sensitive data, reduce risks associated with data leakage, and meet regulatory compliance mandates and corporate governance demands.