Marketing / Lifecycle
Email Open Rate open rate, unique open rate
The share of delivered emails that were opened.
The fork, why two teams get different numbers
First a denominator fork: opens / DELIVERED (sent minus bounces) vs opens / SENT, delivered-based is standard and higher.
In the Metric Library
- The full fork, both definitions worked all the way through
- The trap that makes the number lie, on a real export
- Every formula variant, spelled out
- The reconciliation anchor, what to tie it to and when to refuse
Reference: Apple Mail Privacy Protection (reference) ยท email deliverability convention