To access your webmail go to:
http://www.yoursite/webmail
and enter your e-mail account login information.

You may continue to use your other web client like Outlook Express or use both. Just remember once you read your e-mail from one it will not come in again with the other.

Hint: Set up your account properties in Outlook to enable the feature "Leave a copy of messages on server", so it can be read by Webmail when at another computer.

• Sending/receiving messages with multiple attachments.
• Each user has their own address book, which can be popped up during message composition in a separate window, without disrupting your e-mail in progress. Users can even import their address book from Outlook Express or Netscape Mail in CSV format.
  
• Inline image attachment display.
  
• Friendly, attractive, icon-based user interface -- If you don't agree, you can create your own using the built-in interface template support!
  
• Multiple folders, default ones like SENT and TRASH, and support for user-created ones as well.
  
• Configurable limits on outgoing attachment size, folder disk usage, addressbook size.
  
• User preferences, including number of messages displayed on a page, language, signature, and style (color scheme of interface).
  
• Multiple language support.
• Many more little niceties you might not expect to get in a webmail client.