The regular Yahoo! Mail accounts (US) do not provide access via the POP3, SMTP and IMAP email protocols. So you cannot access a Yahoo! Mail account with a standard email program (e.g., Outlook, Windows Live Mail, Thunderbird), unless you take some additional steps.
Here are some options that can provide the type of access you are seeking:
(1) Yahoo! Plus
- paid upgrade
Yahoo offers a paid upgrade for its email accounts. The "Yahoo! Plus" account provides POP3 and SMTP access; the cost is $20/year. For details see: http://overview.mail.yahoo.com/enhancements/mailplushttp://help.yahoo.com/l/us/yahoo/mail/yahoomail/mailplus/pop/pop-14.html
(BTW, I'm not sure that's a particularly good deal, but it is relatively simple to implement.)
There are also some free
work-arounds which will allow email programs to access a regular Yahoo! Mail account.(2) YPOPs! - free software
This program is a "POP3 gateway", which allows Yahoo Mail to be received and sent via any standard email program. You'll need to download the free program and install it; then configure both the Yahoo account settings in your email program and in YPOPs, so they will work together. For details and download, see: http://ypopsemail.com/For configuration guidance, see articles at:http://ypopsemail.com/documentation/37-email-configuration(3) WebMail - free Thunderbird extension
If you use Thunderbird as your email program, there is a free extension which will allow access to various webmail services (including Yahoo). You'll need to download and install both the basic WebMail extension and the Yahoo plug-in; then follow the instructions to configure them for your Yahoo account.
For details and download, see: http://webmail.mozdev.org/