PHP联系表单获取错误“missing_mailbox @ syntax_error”

I have included my PHP code and hopefully someone can spot the error! I have replaced my email for privacy and spam reasons.

<?php
    header('Content-type: application/json');
    $status = array(
        'type'=>'success',
        'message'=>'Thank you for contacting us. We will get back to you as soon as possible. '
    );

    $name = @trim(stripslashes($_POST['name'])); 
    $email = @trim(stripslashes($_POST['email'])); 
    $subject = @trim(stripslashes($_POST['subject'])); 
    $message = @trim(stripslashes($_POST['message'])); 

    $email_from = $email;
    $email_to = 'test@email.com';//replace with your email

    $body = 'Name: ' . $name . "

" . 'Email: ' . $email . "

" . 'Subject: ' . $subject . "

" . 'Message: ' . $message;

    $success = @mail($email_to, $subject, $body, 'From: <'.$email_from.'>');

    echo json_encode($status);
    die;
 ?>