How to prevent accidental resends after unsubscribes?

Resending after unsubscribe is preventable with proper controls:

Real-time sync: Unsubscribe triggers immediate suppression update. No batch delay between unsubscribe and suppression. All systems updated within seconds.

Pre-send verification: Final suppression check immediately before each send. Catches unsubscribes that occurred during flow wait periods. Never rely on status at flow entry alone.

Automation exit triggers: Unsubscribe event forces exit from active flows. Scheduled emails cancelled for unsubscribed contacts. No manual intervention required.

Queue management: Review scheduled send queues for suppressed addresses. Clear queued sends when suppression occurs. Prevent sends already in pipeline.

Testing protocols: Test unsubscribe mid-automation flow. Verify all scheduled sends cancelled. Monitor for any post-unsubscribe delivery.

One post-unsubscribe email can generate a complaint and legal exposure. Prevention must be bulletproof.