How to create dynamic users for IMAP Email services

[KK]

Hello Everyone -   I am a new entrant to the "qmail" world and have recently installed the qmail_1.03 server on a Red Hat Linux 6.0. I have also istalled the UW-imap server with Maildir support. I have successfully configured NS-Communicator to send and receive mails using the IMAP ptotocol using qmail. I am even able to send and receive emails using Outlook Express from other Windows systems in the local network. For accessing thses emails, I was creating system users by logging-in as root and using the LInuxConf utility. Now my questions are:   1. How do I create dynamic system users (and assign them passwords) and the mail directories within the users home directories from inside an email-client application, which uses the IMAP protocol to access emails (just like it is done on hotmail.com or any other web-based email systems)?   2. Is the creation of system users avoidable for generating email addresses? For eg. can I have an email addrress account hosted on the above email server - [EMAIL PROTECTED] without creating a system user named "joe"? If yes, how can I make this possible, both as a root user and also from within an email-client application? Is there a readymade script available to do this?   I hope I have explained my problem in the right sense and am able to put across the issue at hand. Any (and in fact all) replies/help is highly appreciated. Hoping to get some replies from the techie gurus.   Thanks & kind regards.   KK [EMAIL PROTECTED]