Login to your cPanel account using your username and password at http://yourdomain.com/cpenal where yourdomain.com refers to your domain n name.
Scroll down to access the Email menu and click on Email Account.
Click on Email Account and the next window will display a list of your email accounts. Select the Email account you want to change the password and click on “MANAGE” button.
In the new window type new password. You can use GENERATE button to create a password according to you set preferences.
After creating your new password click on “UPDATE EMAIL SETTINGS” button at the bottom of page.
That’s it. You have successfully changed your webmail pasword.