Problem setting up Yahoo account in Mail

hey guys i am trying to set up my Mail account so that I can receive my personal emails (yahoo), and my school emails all through Mail. The only problem is that I am coming across some problems, i go to file>add account> i then change it to POP, and then fix all the information> NEXT> then i change incoming mail server to mail.yahoo.com, put in my user name and password. hit continue and then it says that it failed.... am i doing this wrong? i did the same with my school email and it also did not work any help please