I'm expecting a package via USPS today; it showed up in Informed Delivery this morning as expected (my only expected mail today as it happens) and the tracking status earlier today was "out for delivery." Yet again, as I watched the mailman stop at my box at the curb and seem to take several minutes futzing around with something, nothing was delivered and the status changed to "held at customer request" as I watched him drive off. Did I say, "yet again?!"
Sounds like it didn't fit in the mailbox and he didn't feel like making the long, arduous trek to your door.