Use the AWS End User Messaging SMS console or AWS CLI to delete an opt-out list.
To delete an opt-out list using the AWS End User Messaging SMS console, follow these steps:
Open the AWS End User Messaging SMS console at https://console.aws.amazon.com/sms-voice/
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In the navigation pane, under Configurations, choose Opt-out lists.
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On the Opt-out lists page, choose an opt-out list, choose Delete.