It's easy: I set a rule in Mail that flags every email containing "Unsubscribe" or related terms with a red flag, and I review and mark them as junk when they s

It's easy: I set a rule in Mail that flags every email containing "Unsubscribe" or related terms with a red flag, and I review and mark them as junk when they show up. Every newsletter is spam because I would never ever sign up for one, regardless of whether I do business with the sender. Either they are illegally mailing me spam from some list that they purchased, or they hid their "please don't send me bullshit" opt out when I signed up for their services, because I would never ask to receive marketing or product updates. It's all spam.