In order to use a Yahoo mail account with POP3 you need to have a Yahoo Plus account.
You need to setup your Yahoo email to use POP3 first. Go to your Yahoo webmail (Yahoo.com) open your email with your username and password.
Click on Options and Mail Options. Click on POP and Forwarding in the menu and then Set up or edit POP & forward.
Check the Web & POP access. You are now ready to set up your Outlook.
To create and configure a new Yahoo e-mail account in the Outlook software:
1. Launch the Microsoft Outlook software.
2. Click the Tools menu, and then click E-mail Accounts.
3. Choose the Add a new e-mail account option by clicking it, then click the Next button.
4. Choose the POP3 option by clicking it, and then click the Next button.
5. In the Your Name box, type your name as you wish it to appear on outgoing e-mail.
6. In the E-mail Address box, type your Yahoo e-mail address, for example, yourmail@yahoo.com.
7. In the User Name box, type your Yahoo email, for example,yourmail@yahoo.com.
8. In the Password box, type your Yahoo password.
9. In the Incoming mail server (POP3) box, type:plus.pop.mail.yahoo.com.
10. In the Outgoing mail server (SMTP) box, typeplus.smtp.mail.yahoo.com.
11. Click the More Settings button.
12. Click the Outgoing Server tab.
13. Click the My outgoing server requires authentication box to place a check mark in it.
14. Choose the Use same settings as my incoming mail server option by clicking it, then click the Advanced tab.
15. In the Incoming server (POP3) box, type995
Check the This server requires an encrypted connection (SSL)
16. In the Outgoing mail (SMTP) box, type465.
Check the This server requires an encrypted connection (SSL)
Note: In the Delivery section click the Leave a copy of each message on the server box to place a check mark in it, and then click the OK button.
16. Click the Next button.
17. Click the Finish button