Junk mail folder
The junk mail folder or spam folder is a place used to store unwanted incoming e-mail so that it stays out of a user's inbox. All major e-mail clients and webmail services include junk mail folders (usually referred to as a spam folder) for their users due to the increasing volume of unnecessary and advertisement-based e-mail in the 21st Century.
How does it work
When you receive a message, your e-mail service looks at the time it was sent, the sender's e-mail address, and the content of the message. If any of these aspects look suspicious, the client filters the e-mail to the spam folder accordingly. E-mail services allow the user to decide what should or should not be sent to the junk mail folder by adjusting certain settings.
How to access the junk or spam mail folder
The destination of the junk mail folder varies slightly from service to service, but they're all in a similar area.
On the left-hand side of the screen, under the Categories section, click on . You'll then see an expanded menu with the label Spam.
As soon as you log into your Yahoo! e-mail account, you'll see the selector that allows access to the Spam folder on the left-hand side of the screen.
As soon as you log into your Outlook.com e-mail account, you'll see the selector that allows access to the Junk Email folder on the left-hand side of the screen.
Note: If you are unable to see the list of your folder list, click next to Folders to expand the menu.