If it fits it ships....

Sources:

https://www.thoughtco.com/when-it-was-legal-mail-babies-3321266#:~:text=Yes%2C%20%22baby%20mail%22%20was,Service%20%E2%80%94%20first%20started%20delivering%20packages.

https://postalmuseum.si.edu/very-special-deliveries

https://www.thoughtco.com/history-of-mail-1992142

https://www.redbookmag.com/life/g26258673/facts-about-the-postal-service/

Music: 

www.purple-planet.com