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I checked our logs for the addresses in your form and indeed, the email notifications are failing to be delivered. It looks like your address was rejecting emails from our address as spam for a period of time. When enough were rejected, it resulted in your address being placed on our bounce list to prevent further rejected emails.
I removed your addresses from the list and the notifications should attempt to send once again. For more information on preventing this form happening in the future, please see the following guide: