Ernst Lubitsch directed this 1940 comedy, based on the Nikolaus Laszlo play, about two people who work together with friction and animosity, yet unknowingly are in love with each other as anonymous pen pals. It’s the same story recycled for both the Tom Hanks-Meg Ryan movie You’ve Got Mail and the Broadway musical She Loves Me – and here, the passionate postal lovers are played by James Stewart and Margaret Sullavan.