Marketo unsubscribing users from multiple emails

We’ve seen a sharp spike in unsubscribe rates in recent months. Unsubscribe logs show users being marked as unsubscribed across multiple emails (see image), with entries spaced just 5 minutes apart—this does not reflect actual user behavior.

This issue began in June 2025, coinciding with the rollout of one-click unsubscribe by major email providers. It now inflates unsubscribe metrics, distorts performance data, and raises serious concerns about potential domain reputation impact.

Other Marketo customers are reporting the same problem. This is more than noise in analytics—it’s a systemic issue that demands urgent investigation and resolution.