Mail refuses to learn that emails from a certain sender are not junk

I have a Woocommerce webstore that send me an email notification whenever I get a new order. Recently Apple Mail has decided these emails are spam and moves them into the junk folder. I've spent weeks clicking "not junk" on each of these and Mail refuses to learn these are legitimate emails. They are all from "store@mydomain.com", with the "reply to" address reflecting the email of the customer. The subject always contains the text "New customer order" along with other details like the order number and date. I have added "store@mydomain.com" to my address book. It has not stopped this behavior. I have created a rule that any emails with a subject containing "New customer order" by moved to a folder. This also does not work. I have lost a few orders this way. Any ideas?