Ha! I'm an ex-postal worker.
First day on the job I saw how they sort packages.
Ever seen packages fly? Wrong. Not till you've been in the USPS.

I found letters under machines that were like 15 years old.
Everyone hated me. I was told I made them "look bad."
Needless to say, they got rid of me quickly.
I was a temp, and even though I scored well on their test they wouldn't hire me.
I once saw an ex-con get a permanent position and he didn't last half a day
before he ditched the truck in the middle of the street somewhere.
I got offers AFTER they let me go.
By then I was at the water utility and never looking back.

Anyway, rant over, it's amazing anybody gets their mail.
If you do get your mail, it's because the person who delivered it is going the extra mile.