What is a mail folder?
A mail folder is a file which contains e-mail messages which have been grouped together for some reason. It is common to have a folder named received created by the system to hold all the e-mail you have already read but did not choose to delete. You can also group e-mail into folders according to topics and/or sender. It is a way to save mail into folders which have a name associated with it so you can remember what is in there (e.g. volleyball, admin, whitehouse, jokes, thingstodo, etc).
