Why Email Agent Hijacking
Marks the End of Post-Delivery Email Security

AI agents are now reading, interpreting, and writing email before humans ever see it, and email security built for human inboxes can't protect them.
As enterprises accelerate AI adoption, agents such as Microsoft Copilot are becoming active participants in communication workflows: summarizing messages, drafting replies, and triggering actions automatically. This creates a new attack surface, where malicious content in a single incoming email can influence AI behavior, trigger unsafe interpretations, or manipulate outgoing AI-generated communications. Attackers no longer need a user to click anything. They only need an AI agent to read. 

Why Email Agent Hijacking   Marks the End of Post-Delivery Email Security
Attackers are continuing to adopt AI to accelerate phishing, impersonation, social engineering, business email compromise, and other advanced threats. Security teams need to understand not only the threats they are facing today, but also the capabilities required to stay ahead of what is coming next.
Watch Check Point's Gil Friedrich, General Manager of Workspace Security, and Yoav Shay Daniely, VP of Product Management, as they break down how Email Agent Hijacking works, why it marks a fundamental shift from protecting human users to protecting AI systems, and how organizations can defend their AI agents from malicious email inputs and manipulated outputs. 
In this webinar, we covered: 

• Why Email Agent Hijacking threats evade traditional email security approaches 
• How email attacks have evolved since the EchoLeak exploit in Microsoft 365 Copilot 
• Why post-delivery email security is ineffective when AI agents process email automatically
• How to protect AI agents from malicious email content and prevent manipulated outputs 
• Why prevention-first email security is required for the agentic era