Twenty-one pages, separated into her, the partner, the baby, and going home. It was written by someone who had already packed one badly, and it says plainly which things the hospital already provides, so you are not packing what you will not use.
It is for anyone in the third trimester, and for the friend who might have to grab the bag if you are not home when the call comes. There is a one-page summary you can hand to exactly that person.
No email needed. Take it, print it, put it by the door.