code: def process_delivery(message, notification):
      
      mail = message['mail']
      delivery = message['delivery']
  
      if 'timestamp' in delivery:
          delivered_datetime = clean_time(delivery['timestamp'])
      else:
          delivered_datetime = None
  
      deliveries = []
      for eachrecipient in delivery['recipients']:
          # Create each delivery 
          deliveries += [Delivery.objects.create(
              sns_topic=notification['TopicArn'],
              sns_messageid=notification['MessageId'],
              mail_timestamp=clean_time(mail['timestamp']),
              mail_id=mail['messageId'],
              mail_from=mail['source'],
              address=eachrecipient,
              # delivery
              delivered_time=delivered_datetime,
              processing_time=int(delivery['processingTimeMillis']),
              smtp_response=delivery['smtpResponse']
          )]
  
      # Send signals for each delivery.
      for eachdelivery in deliveries:
          signals.feedback.send(
              sender=Delivery,
              instance=eachdelivery,
              message=message,
              notification=notification
          )
  
      logger.info('Logged %s Deliveries(s)', str(len(deliveries)))
  
      return HttpResponse('Delivery Processed')
docs: Function to process a delivery notification