Spirit Mail are golden bags scattered around the game world which will allow you to access a certain area of the main village.
When you find one of them, a point will be marked on the map indicating where you have to deliver it and thus gain access to a previously inaccessible area.
Finding and delivering all Spirit Mail will unlock "The Last Stop" Achievement / Trophy.
Spirit Mail (Fields)When you reach the forge, go down the stairs on the east side to the cave below it. Use the tear there to fill the cave with water, then swim left and go out onto the balcony where you will find a sack.
Spirit Mail (Forgotten Forest #1)See Rot (Forgotten Forest #3) description on how to get to the top and then grapple to the three flowers. The first one is shown in the picture below.
Spirit Mail (Forgotten Forest #2)While climbing to the God Tree Shrine, you must use the blue flower and get to the tree where this bag is.
Spirit Mail (Rusu Mountain #1)The bag is located in a small cave that you can get to by climbing up the rock protrusions to the right.
Spirit Mail (Storehouse)In the house which you will pass by going to one of the crystals powering the door. First, you need to remove the corruption here.
Spirit Mail (Village #1)To enter the house where the item is located, you need to move the barrel standing next to the building and enter through the opening in the roof.
Spirit Mail (Village #2)In the room at the top of the tower.
Spirit Mail (Village #3)
Spirit Mail (Village Heart #1)
Spirit Mail (Village Heart #2)
