The lifecycle email metrics that actually predict revenue

April 21, 2024

Email marketing has a measurement problem. For years, open rates were the default success metric — and then Apple's Mail Privacy Protection made them unreliable overnight. The agencies that had built their reporting on open rates were left without a compass. The ones that had always focused on revenue-aligned metrics barely noticed.

The metrics that matter are the ones that connect email to revenue: click-to-conversion rate, revenue per email, list growth from qualified sources, and engagement decay rate. These metrics tell you not just whether people are reading, but whether your email program is driving business outcomes.

Lifecycle email is a different discipline from broadcast email. It's about sending the right message to the right person at the right stage of their journey — onboarding, activation, retention, reactivation. Each stage has its own metrics, its own content, and its own goals. Treating lifecycle email as a single program is the most common mistake we see.

Finally, invest in the infrastructure. A lifecycle email program is only as good as the data feeding it. Clean event data, reliable segmentation, and a flexible automation platform are prerequisites. The creative is the easy part; the plumbing is where most programs fail.