If you've configured your cPanel hosting account to use the Spam Box feature of SpamAssassin, mail identified as spam will be placed in a spam folder; however, you will not immediately see the spam folder in webmail if you have not created or subscribed to it.
Pop clients (such as Outlook): Your mail program has a way to subscribe to your new folders. Please refer to the help section of your program.
Note: The SpamAssassin feature SpamBox recognizes the folder name 'spam' in all lowercase, and not 'Spam'. If the folder name is 'Spam', the intended mail will not be delivered to the correct folder.
RoundCube Webmail
If a spam folder does not exist, you will need to create it.
Visit the cPanel webmail interface and choose RoundCube.
Click on the Settings icon in the top-right corner of the page.
Click on the Folders tab.
Click the + button in the bottom-left corner of the Folders panel to create a new folder.
Under Folder properties, in the Folder name field, type 'spam'.
Click Save.