It’s strange but JForms doesn’t have a field where you can put the subject of the email that goes to the administrator when a form is filled. They will implement it later for sure.
However, if you want to change the subjects of the forms, you should hack the Mail.php code of JForms.
Here is how to do it:
1. Go to /administrator/components/com_jforms/plugins/storage/Mail/Mail.php
2. Find this linke of code:
$mail->SetSubject($field->parameters['subject']);
and replace it with:
$formID = $form->id; if($formID == 1) { $mail->SetSubject(JText::_('TEXT FOR SUBJECT IN FORM WITH ID 1')); } else if($formID == 2) { $mail->SetSubject(JText::_('TEXT FOR SUBJECT IN FORM WITH ID 2')); } else if($formID == 3) { $mail->SetSubject(JText::_('TEXT FOR SUBJECT IN FORM WITH ID 3')); } else { $mail->SetSubject(JText::_('TEXT FOR SUBJECT IN FORM WITH A DIFFERENT ID')); }