The US Postal Service famously battles snow, rain, heat and "gloom of night" in its bid to deliver mail. Nowhere have they said anything about cats.
This cat in particular, caught putting up a furious defense against junk mail, bills and lame holiday greeting cards, seems especially opposed to that mission. Its fierce battle was captured on video by a determined mailman, whose efforts to slip mail through the slot are repeatedly, hilariously, denied.
You've gotta be kitten me.
The clip comes via America's Funniest Home Videos, hence the audience laughter in the background.