Advice on how to change email header

Advice on how to change email header

Hi I have just set up zoho mail, changed the user name and ID to a real person name, but when I send emails it only displays the first word "hello" any advice on where or how I change this? I want the user ID to appear "south african kitchen" and I have changed the ID and mail account in both settings and control panel, but it won't change the display on the mail sent.

Thanks
Keira