How do you know which messages to send to my Bulk folder?
The Yahoo! system automatically filters the majority of incoming bulk or commercial email directly to the Bulk folder of users with POP and Webmail access to their mailboxes (this feature is not available to users with POP-only mailboxes). If you receive mail in your Bulk folder that you would like in your inbox, you can set up a filter to redirect the mail. Learn more about filters.