A high open rate used to mean you were doing it right. In the AI inbox, that link is breaking. Here's why open rate is turning into a vanity metric, and the three things to track instead.

Your deliverability is fine. Your subject lines are solid. So why does it feel like your emails are disappearing? AI inbox tools are now filtering, summarizing, and prioritizing your emails before a human ever sees them — and most creators are still optimizing for the old game. Here's what changes now.