Can I access my Netscape WebMail or Hotmail accounts through Thunderbird?
No. Netscape WebMail and Hotmail use proprietary protocols. To access WebMail directly through an e-mail client requires you to use Netscape 6+ with AIM; to do so with Hotmail requires either Microsoft Outlook or Outlook Express. Of course, you can access your WebMail account on the Web at http://webmail.netscape.com/, or Hotmail at http://www.hotmail.com/.