This article presents possible use cases and corresponding sample flows that you can support. It provides a useful starting point as you plan your implementation.
A marketing team wants to determine which subject line drives higher open rates before committing to a full send. They run two variants of the same campaign with different subject lines, measure the results, and send the winning variant to the rest of the audience.
Prerequisite: Create and publish two campaigns with different subject lines before running this flow.
To A/B test email subject lines:
email.opened count for each campaign to determine which subject line performed better.activity set to CLICKED to identify the most engaged recipients.emailDistributionOptions.labelIds to send the refined campaign to the engaged audience.Last updated: 10 September 2026