change the email passwords on my hosting without cPanel

[expertoff]

I have created on my hosting many email addresses. These email boxes are used by employees of my company. I would like to know what is the procedure for changing the passwords of these email boxes without the help of cPanel?

[hood]

Give the following instruction to your users:
Use webmail to login. Lets everyone to login to his mailbox using webmail

http://www.yourdomain.com/webmail

There they must fill email address and password to login. Let they click on the Change Password icon (the big one first icon on bottom of page). Now, they can change new password in the appropriate fields. Pressing the Change button, the change will occur.