Hello @HeileighB ,
For compliance reasons, you can't really mass-email unsubscribed contacts through us. The only emailing we allow you to do to contacts that've unsubbed from you through us, is to send individual resubscribe confirmation emails. The only mass-email option you could potentially try would be to email them outside of our system, but I would generally advise against this since unsubscribing also has legal implications. Even still, you'd need to get them manually resubscribed one-by-one.
Generally speaking, if a contact has been marked as unsubscribed from you, you'll need to go through the resubscription process. However the easiest method for a contact to resubscribe to you would be for them to go through one of your sign up forms, either a landing page form or one coded into your website.
If they’re unable to get signed back up through a sign up form or through the resub email, you can request our Review team do a manual override of the unsubscription. You’ll need to get an email directly from the contact explicitly stating they want to be resubscribed. Then you’ll need to call into the Review team, and follow their processes from there.
Since there are a number of legal and Compliance-related elements to unsubscribing and resubscribing, we have to make sure one of these three processes is followed.
Unsubscribed contacts overview
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