The Cisco IronPort Systems Email Security Anti-Spam is a subscription license designed for a single user, providing robust email security features to protect against spam and malicious content. This license is valid for a period of 5 years, ensuring long-term protection and peace of mind. Ideal for organizations looking to enhance their email security without the hassle of frequent renewals, this volume license is priced for 2000-2999 users, making it a cost-effective solution for larger teams.