Hmm, I don't see an obvious issue ... I assume everything is on the same domain?
Can you do this for the handler as a test?
<?php
//header('Content-type: application/json');
$status = array(
'type'=>'success',
'message'=>'Thank you for contact us. As early as possible we will contact you '
);
$name = trim(stripslashes($_POST['name']));
$email = trim(stripslashes($_POST['email']));
$subject = trim(stripslashes($_POST['subject']));
$message = trim(stripslashes($_POST['message']));
$email_from = $email;
$email_to = 'support@rightvirtualassistant.com';//replace with your email
$body = 'Name: ' . $name . "\n\n" . 'Email: ' . $email . "\n\n" . 'Subject: ' . $subject . "\n\n" . 'Message: ' . $message;
echo $body;
//$success = @mail($email_to, $subject, $body, 'From: <'.$email_from.'>');
//echo json_encode($status);
//die;
echo "Finished";
Note the "header" has been commented out and I've removed error suppression from your trim statements.