Step 1: Navigate to the cPanel Login page
Step 2: Enter your username and password and click the "Login" button.
Step 3: In cPanel "Email" section locate and select "Email Accounts" icon.
Step 4: In the "Email Accounts" page locate and select "Password & Authentication" adjecent or associated with email account you want to manage.
Step 5: Enter new password into Password field and enter password again into "Password (Again) field. Then click "Change Password" button.