So, while I was navigating the USPS post office site to find my mis-addressed package, I found they have a new feature: Informed Delivery. If you sign up for it, a few days later they email you photos of the mail coming to your mailbox.
For example, today I am getting this piece of junk mail:
... plus a more officious-looking bit of junk mail:
... and two other pieces of junk. So, not going out to the mailbox today.
If there are packages, it looks like they list them separately. i almost want to send myself a letter just to see it show up in my email.