Add marketing unsubscribe contacts to SMS suppression list

Your marketing list removals can still be messaged via SMS when suppression lists aren't synced. Keep opted-out contacts suppressed across systems so you avoid accidental outreach before the next send.

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Overview

Out-of-sync suppression lists expose you to accidental SMS sends and compliance headaches. This flow moves list removals into your SMS suppression list so campaign managers stop messaging opted-out contacts, preventing accidental outreach before the next campaign send.