i deleted my wife account and added again and it didn’t work as it doesn’t put the correct mail sever addresses in by default. I did a search and this worked for me. It orginally said .net for the outgoing server but that didn’t work i changed to .com at it was fine.
go into the add account bit in settings and add a pop3 account, in the E-mail Address box, type your e-mail user name, followed by @yahoo.com.
Under Server Information, do the following:
In the Incoming mail server (POP3) box, type pop.mail.yahoo.com
In the Outgoing mail server (SMTP) box, type smtp.mail.yahoo.com
Under Logon Information, do the following:
In the User Name box, type your user name. Do not include @yahoo.com.
In the Password box, type your password.
Select the Remember password check box.