Hi, im one of the engineers that built SESS. I can't get into specifics but we have a nifty little algorithm that works at multiple levels right from checking w

Hi, im one of the engineers that built SESS. I can't get into specifics but we have a nifty little algorithm that works at multiple levels right from checking whether you have a valid business email to email list scanning to match bounces from a master bounce list etc. etc. Finally if it deems the list is risky it triggers an automatic payment refund.