Junk mail and Spam mail
What is the difference between Junk mail and Spam mail and why are there two different folders?
In my Gmail account there is a Spam folder which I cannot rename. Most of the "spam" goes into this folder but doesn't appear in the Junk mail folder. Trying to permanently delete the contents of the Spam folder using the junk mail menu options doesn't work and using the delete key sends it to the Trash folder where I have to delete it a second time.
This change started under Mojave and has continued under Catalina.
MacBook Pro 13", macOS 10.15