How do I change the subject header in the mail wich the form send to me?

I understand that you want to change subject of the email notifier for your JotForm. You can change the subject from the Email setup wizard. Please follow the steps below :

1. Click on Emails and then select Notification

2. Form the compose email window, you can change the subject of the email

3. Click on Finish to complete the wizard

4. Save your JotForm

Hope this information helps!