Yahoo Mail offers standard POP3 access for receiving emails incoming through your Yahoo mailbox, by using your favorite email client software.
To setup your email client for working with your Yahoo account, you need to select the POP3 protocol and use the following mail server settings:
Incoming mail server (POP3): plus.pop.mail.yahoo.com (SSL enabled, port 995)
Outgoing mail server (SMTP): plus.smtp.mail.yahoo.com (SSL enabled, port 465, use authentication)
And there is a piece of software Ypops to help access Yahoo-Mail via pop3
Hope this helps.