With the changes being made to the delivery system can you please make the name box a drop down option that will have stored recently typed names, so when I am delivering stuff to mules i do not need to keep retyping the names over and over, I can just select from the list if I had used it before.
Another suggestion is to also make a quest to unlock an option to summon an npc to the field or something than you can do in the field to deliver stuff to your d.box. There is the lost mail quest in windy, so make it like a mailman in the field who is off delivering stuff and can deliver your stuff if you've done some pre-req quests.