Reset email account password via cPanel :
1. Access to cpanel via portal (http://domain.name/cpanel) with login credential.
2. Once enter, proceed to click on "Email Accounts" under Mail session
3. Select the email account your wish to modify password and click on "Change Password"
4. Now the row has been extend. User may proceed to assign the new password on the blank column and click on "Change Password"
button to complete the process.
5. Your email account password was changed. Do try to access it via webmail (http://domain.name/mail)