You can change the password for any email associated with your domain by loggin into the cPanel control panel.
Step 1: Log into the control Panel
Follow this link…
Step 2: Enter your username and password at the prompt
Step 3: Once logged in, click on the email icon
Step 4: Click on the “Change Password Link”
Step 5: Enter the new password twice. FIrst in the box marked 1, then again in the second box. Then click “Change Password”.
You are done…..