Force email providers to send back email notification to senders if their message is going to receiver's spam filter.

Force email providers to send back email notification to senders if their message is going to receiver's junk or spam filter. Many email providers has practice to redirect eligible emails to receiver's junk or spam filter. The email sender never know about it and all ecommerce businesses are losing contact with his customers due to that practice. For example when the person placed an online order the online seller is sending order confirmation and shipping confirmation emails. If it is going to junk filter the buyer will not know about it. About 90% of buyers never check spam filter until they contact seller to check order status. If the email providers will notify email senders the ecommerce businesses may contact customers and notify them to recover message from their junk or spam filter