What is web-based E-mail?
Web-based e-mail is accessed through the Internet. You use your browser (Internet Explorer, Netscape) to go to the mail service's Web site (mail.yourdomain.com), where you enter your username and password to open your personal mailbox.
The primary advantage of Web mail lies in the fact that you can use ANY computer with a browser and Internet access to check your mail, freeing you to check your mail virtually anywhere. On the other hand, e-mail programs that are configured on
your own computer limit your mail accessibility to that computer. The popularity of Web mail has increased dramatically, accounting now for about 35% of all e-mail boxes worldwide.
 

Editing Preferences:
 The first thing you need to do to set up your E-Mail in Netscape navigator is to click on Edit at the top left of your browser then scroll down and click on the preferences tab then you should see this screen.

Setting up your mail server preferences:
To set up your mail server settings simply go to the Outgoing mail server and type mail.yourdomain.com  in the Outgoing mail (SMTP) server box. Next click the ADD button in the Incoming Mail Servers screen then you should see something like below.

Mail Server Properties:
When this dialog box appears type mail.yourdomain.com in the Server Name text box then in the Server Type drop down box select POP3 server then click the OK button.

POP Properties:
Leave Messages on Server - You can also check this box if you wish to leave your messages on the server, in sync with the web based email. Otherwise when you check messages, they will delete from the server.
Most people do not leave messages on the server to avoid going over the disk quota. It's often handy to check your email from a remote location in the web based email (mail.yourdomain.com ), allowing you to reply to urgent messages, and then when you get back to your main PC your mail will download to your computer.
When deleting a message locally, remove it from the server - This can be a handy setting if you choose to leave your messages on the server. If you get a message you want to keep, simply file it in another folder. If you get an unimportant email, or SPAM, simply delete it from your inbox and that will delete it from the server as well, even if you are leaving messages on the server.