RISOLTO:
Codice PHP:
...
$headers = "From: ".$name." <".$email.">\r\n";
$headers .= "Reply-To: ".$email."\r\n";
$headers .= "Return-Path: ".$email."\r\n";
...
Codice PHP:
...
$sent = $temp->send($email,$adresa,$email_subject,$headers);
...