Add stopped subscribers to suppression segment in lists

Your cancelled subscriptions sometimes stay in active lists, causing wasted sends. It moves them to suppression so campaign managers stop contacting churned addresses before the next send.

Overview

When cancellations occur, campaign lists quickly accumulate churned addresses that hurt deliverability and waste budget. This flow routes stopped subscribers straight into your suppression segment so campaign managers stop contacting churned addresses within minutes and protect next-send performance.