I was listening to the Andrew C. Fix's lectures titled Renaissance, the Reformation, and the Rise of Nations. While looking at the narrative of Luther's life, he makes a seemingly offhand remark claiming that Luther did not nail anything on the church door. Instead, he simply mailed his Ninety-five Theses to Archbishop of Mainz Albert of Brandenburg. Seemingly he expected him to respond in a sort of "my bad" manner and withdraw the indulgences that were solid under the theologically false claim that they were doing anything but reducing temporal purgatory penance.

Googling since then, I've seen all sorts of conflicting claims. So what happened?