According to Yahoo Help, you must be a Plus user to access your account with an email client program like OE. However, some answers have posted info about a program that supposedly works with free Yahoo accounts. Keep an eye out for it as this questions is often asked and that program is often named in the answers.
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You can use free ypops fully compatible with yahoo mail and works
with Outlook Incredimail Thunderbird
and others
http://ypopsemail.com/
According to Yahoo Help, you must be a Plus user to access your account with an email client program like OE. However, some answers have posted info about a program that supposedly works with free Yahoo accounts. Keep an eye out for it as this questions is often asked and that program is often named in the answers.
http://www.microsoft.com/windows/ie/ie6/using/howt... see if anything here helps.