You could always remind him that you are working on Monday and give him two choices: 1) schedule a time to pick up his mail when you are home; or 2) you can leave the mail in a specified place outside. Don't spend a lot of time over thinking this one. Give him the choices and see what he opts to do.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
