You can change the folders of your primary E-Mail account by assigning other folders to a default folder.
How to assign other folders to the folders of your primary E-Mail account:
Click the icon on the right side of the menu bar. Click the menu item.
In the side bar, click on .
Click on next to E-Mail in the display area. The settings are displayed in a pop-up.
Scroll down to Standard folders.
Click on next to a folder. Select another folder.
Click on at the bottom of the pop-up.