Uncheck this checkbox to store mail for this account in its own directory. That will make this account appear as a top-level account. Otherwise, it will be part of the Local Folders Global Inbox account.
若取消勾选此项，此账户的邮件将存放在本身的目录内。此账户将显示为顶层账户。否则它会从属于本地的全局收件箱。