Live Mail or Mozilla Thunderbird. Or, if you have MS Office, you could always use Outlook.
SORRY, that bird does not fly. YAHOO mail does not work with windows live mail, you have to pay to have YAHOO MAIL PLUS, otherwise yahoo servers denie access to you regular free mail, same with MOZILLA THUNDERBIRD. As far as using regular Outlook from Vista or previous OS, MICROSOFT found out people were doing that and slipped in an update that effectively makes it not work with thier setup if you dont catch on to what they did. Anymore suggestions?