Pretty sure this or part of this just burned me. Icing on the cake is Nintendo will also ban hammer your email if it rejects some or all of their emails - including their dumptruck of marketing junk. The only and I mean only resolution to this is to basically move your Nintendo account to a different email completely. Absolutely unreal on both sides.

Yes, no one should not have DKIM or DMARC but holy yikes when neither side wants to actually give in to help the customer.