Sorry to hear this is happening when you're trying to Add Back an Unsubscribed Contact! If this contact cannot see this resubscribe email in their inbox, we always suggest checking their Spam Folder or their Promotions Tab if they use a Gmail address. If it's not in either location, we would be happy to look into this further for you. We would then have you please email us at social_support(at)constantcontact(dot)com with your username, the contact's email address and a reference to this post.
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