The magic mailbox!
How could I praise you highly enough?
You delivery mail in a hurry--
From 114 to 540 in less than 24 hours.
That's the speed of light in the standard of postal services!
You sometimes reward me by skipping stamps on my postage stamps.
That's kindness, albeit accidental, in the uppermost form!
The man about to send another mail,
I salute you!