When a pilot has to turn back due to a severe storm, he drops the mail at a remote outpost where it can be delivered by dogsled. The falling mail pouch lands on Pluto, and he sets out to deliver it. He is continually delayed by a rabbit along the way, but in the end, the rabbit helps Pluto deliver the mail pouch.
Unfortunately the movie Mail Dog is not yet available on HBO Max.
| Directing | Charles A. Nichols | Director |
| Production | Walt Disney | Producer |
| Visual Effects | George Nicholas | Animation |
| Visual Effects | Bill Justice | Animation |
| Visual Effects | Jerry Hathcock | Animation |
| Visual Effects | Jack Boyd | Animation |
| Art | Ray Huffine | Background Designer |
| Directing | Karl Karpé | Layout |
| Writing | Eric Gurney | Story |
| Sound | Oliver Wallace | Music |
