You may need to check on the Wix end to ensure that the opt-in is working correctly for future sign-ups. If it is set up correctly, you can contact our dedicated Integrations team directly so they can assist you live. Click here for a link to their hours of operation.
For the existing contacts in those two permissions, you can send them a link to a sign-up form. This allows them to complete the opt-in process. The link will need to be sent from your own email client.
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