How can I send email from yahoo through outlook for my business account?

I keep getting the error message "Send test e-mail message: Unable to send test message. Please verify the E-mail address field". my e-mail address field is correct so I do not understand why I cannot send email from yahoo through my business account.

If you want to use yahoo as POP a/c, you need either download from ypopsemail.com, or Mail Plus paid service from Yahoo.
Install YPOPs! and make sure it is running.
Open Outlook Express.
Select Tools | Accounts... from the menu in Outlook Express.
Click Add and select Mail....
Type your name.
Click Next >.
Enter your Yahoo! Mail address ("hmmzl34@yahoo.com", for example).
Click Next > again.
Make sure POP3 is selected under My incoming mail server is a ___ server..
Enter "localhost" under Incoming mail (POP3, IMAP or HTTP) server:.
If "localhost" does not work, try "127.0.0.1" instead.
Type "localhost" under Outgoing mail (SMTP) server: as well.
If "localhost" does not work, again try "127.0.0.1" instead.
Click Next >.
Type your Yahoo! Mail user name under Account name:.
The user name is your Yahoo! Mail address sans "@yahoo.com".
In this example, the user name is "hmmzl34".
Enter your Yahoo! Mail password under Password:.
Click Next >.
Click Finish.
Highlight localhost in the Internet Accounts window.
Click Properties.
Type "Yahoo! Mail" under Mail Account.
Click OK.
Click Close.
Useful YPOPs! Options
I recommend you also double-click the YPOPs! system tray icon to change a number of useful settings. You can make YPOPs! ignore messages in the Bulk Mail folder of your Yahoo! Mail account, for example, tell it not to mark downloaded messages as read or have YPOPs! put a copy of outgoing mail in your Yahoo! Mail Sent Items folder.