Yahoo provides regular pop3/smtp access to their email, which works in any email client. Log into the web interface for Yahoo mail, click "Help Desk" on the left, then click "Can I use other email programs, such as Netscape, Eudora, or Outlook, to send and read my Yahoo! Mail?" (should be under Top 5 Questions or Using My Account>External (Pop3) Email). You'll need to sign up to receive some spam every week (only 2-3 pieces), then set up your mail client using
username@yahoo.com, pop.mail.yahoo.com, and smtp.mail.yahoo.com.
~Ladi