I’m familiar with postal services both in Poland and Japan and I like the Japanese solution even more - most of the new buildings have package lockers operated by the building owner and independent from the delivery service. Everyone could put the packages there and my building would notify me about a waiting package when I entered.
That's actually rad, but... it's not that different from making current mailboxes bigger. In PL in large buildings those are on ground floor, next to each other. If you make them bigger you only need to add notifications to match that.
