when you use cpanel email account, anytime you need to change cpanel webmail email password. please follow the step for changing cpanel email password.
1. first, go to cpanel and log in your account
2. next, find email tab and click “email accounts” on your cPanel
3. next, find your all email account list in your cPanel webmail
4. choose the email you want to change password
5. now click manage button right side in your email account.
6. then you find New Password option.
7. please provide the new password, when you want to apply
8. scroll down and click “Update email setting”
9. Success completely changes your cpanel webmail email password.