JMailbox features:

• Full Featured Webmail Client
• Written in 100% ASP (version 3.0)
• Based on the JMail* API (Version 4.x Personal or Pro)
• Uses standard POP3 and SMTP for receiving and sending
• Compose, reply, forward and delete messages
• Messages are kept on the mail server until deleted
• Send and receive multiple attachments (no additional DLL required)
• Optional use of ASPUpload, ASPFileUpload or ScriptUpload for uploading attachments
• Works with multiple users/domains
• Option to keep inbox active.
• Automatically indicate if there is new mail if you remain logged in
• Multiple language modules supplied
  - Chinese, Danish, Dutch, English, French, German
  - Italian, Portuguese, Swedish, Spanish, Turkish
• Option to download only headers to speed up inbox display
• Highlight new messages
• Show Attachments in inbox
• View HTML format messages
• Inbox cached for faster re-loading
• Signatures files
• Accepts name@domain.com and name%domain.com style usernames
• Friendly login error messages
• Option to limit number of outgoing emails per send action
• Option to disable attachment functionality
• ...see version info included for more details...

Requirements:

• Web Server with 100% ASP 3.0 compatability (e.g: NT5 Server)
• JMail* Pro version 4.x (or an earlier Version 4.x Personal)
• Write permissions to installation directories

Most decent Windows based webhosts have the above requirements.
If yours doesn't then here is a good one that does.

PLEASE NOTE: This software hasn't reached version 1 yet. It is still under development. As with any sofware which is under development many desired features are still on the todo list. Changes are being made to it all the time and we therefore welcome your feedback.

If you are interested in the progress of JMailbox then please join the JMailbox newsletter and be informed of the latest updates.

*JMail can be downloaded from the Dimac website.