"AI was once used mainly to detect spam. Now it summarizes email content and acts as a key channel for agents. Email is becoming the connective tissue between AI systems, acting as a trigger point in a growing agent-to-agent ecosystem. Messages that used to be crafted for human readers are now evaluated - and often acted on - by AI long before a person ever sees them."
"These shifts are becoming evident as Gmail and Yahoo Mail introduce AI-generated message summaries and prioritization. As a result, the carefully optimized elements marketers rely on - from names, subject lines and preheaders - may be rewritten, reordered or ignored altogether. In some cases, the message may not surface at all. If you're used to focusing on clever subject lines and calls to action, it's time to rethink your approach. Human-to-human email models are yielding to agent-to-agent (A2A) communication."
AI has evolved from spam detection to summarizing messages and enabling agent-driven actions. Email functions as connective tissue between AI systems, triggering agent-to-agent workflows that evaluate and act on messages before human viewing. Major providers like Gmail and Yahoo Mail deploy AI-generated summaries and prioritization, undermining traditional optimizations such as names, subject lines, and preheaders, which may be rewritten, reordered, ignored, or never surfaced. Marketers must move beyond clever subject lines and calls to action toward strategies that anticipate agent behavior. Control and configuration of agents will determine outcomes more than the underlying technology.
Read at MarTech
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