When I export messages from WinMail, a folder name gets changed and I don't want it to change!!! I tried a different name as an experiment, and it still changed it to the same different name.
In WinMail its name is--Dometic Waeco and when it is exported to Documents it changes to--Frig Cool 6a1. (The folder holds many emails from Dometic, a frig cooler company)