I have no idea how you have Netscape set up but I see no point whatsoever in keeping it if you have an Earthlink account and your Earthlink mail is working, which it apparently is. I used Earthlink for 5 years or more until a change of telephone providers in the area forced me to change to EMBARQ.
You can access your Earthlink mail via their WebMail interface and/or receive your mail in an email client installed on your computer, such as Microsoft Outlook Express, Microsoft Outlook, or Mozilla Thunderbird.