The Cisco IronPort Systems Email Security Email Encryption is a subscription license designed for a single user, providing robust email security features. This license is valid for one year and is available at a volume pricing level for organizations with 20,000 to 49,999 users. With this license, users can enjoy peace of mind knowing their email communications are secure and encrypted, protecting sensitive information from unauthorized access. The product is ideal for businesses looking to enhance their email security protocols without compromising on usability.