The Messerschmitt M 28 was a mail plane developed in Germany in the early 1930s to meet a requirement by Deutsche Luft Hansa. It was a single-engine, low-wing cantilever monoplane of conventional design with an enclosed cockpit and fixed, tailskid undercarriage.Despite successful trials, Luft Hansa changed its requirement and did not purchase the design, possibly due at least in part to the enmity of Luft Hansa director Erhard Milch towards Messerschmitt.