New request from email with field populated

New request from email with field populated

Hi everyone,
when SD fetches an email, I'd like  SD to populate the fields below for gererateing a new request.
How can I do that?

Thanks
Nick
$RequestId
$CreatedDate 
$Site
$RequesterName  
$RequesterMobile
$RequesterPhone
$RequesterMail
Segnalazione:
$Category
$Item
$Description 
$Technician