Does anyone know where the occuring theme in fanon that Derpy is associated with mail delivery came from? Was it shown in an episode, like the muffin association (ironically, it wasn't even Derpy who said that line).
It can from a fanfic. Someone made it up and it caught on.


With the ret-conned Derpy episode they didn't do a bad job with the voice but I really prefer the original and agree that there wasn't any need for it to be changed at all.