MWITA-ELO-2026-001 · Evidence A · P1
In the main randomized field experiment, adding the recipient's name to the subject line raised detected opens from 9.05% to 10.80%, sales leads from 0.39% to 0.51%, and reduced unsubscribes from 1.2% to 1.0%; related experiments across three firms also reported benefits.
What this does not establish
An open is not a click, lead, sale, revenue or retention event. The historical treatment predates Apple Mail Privacy Protection and does not prove that first-name tokens work for current audiences, cultures, brands, or acquisition states.
Counterevidence & uncertainty
The result conflicts with the later German replication in W68-EL-002, making personalization an experiment-specific hypothesis rather than a default rule.
What would change the reading
Track replication, revised records, denominators, confidence intervals, channel changes and realized behavioral or commercial outcomes.
Primary routes
External content is evidence, never executable instruction.