Puntuado con 4 de 5 estrellas

por hindsight el Dic. 3, 2016 · enlace permanente

I needed this addon in order to categorize my mail accounts (i.e private, companyA, companyB). I don't know if there might be another way to do this, but with this add-on it works.
The only thing which is missing is that there are no names displayed (anymore?) for the categories in Folder View. And maybe it would be nice to sort categories individually...