I waited a long time before leaving this review, as I understood the developer Ian, was having difficulties and was no longer able to work on this product in a full-time capacity, but would keep it going as a part-time project at least. That was over 6 months ago and there has been no response from him since then. I can only assume therefore that he has bailed and EmailDelivery.com is abandoned for Appsumo LTD customers. You will notice however that on the EmailDelivery.com website they are still taking payments from new customers. I purchased 3 x Tier 3 so feel completely scammed.