Just paste the function below into your functions.php file.
function direct_email($text="Send by email"){
global $post;
$title = htmlspecialchars($post->post_title);
$subject = 'Sur '.htmlspecialchars(get_bloginfo('name')).' : '.$title;
$body = 'I recommend this page : '.$title.'. You can read it on : '.get_permalink($post->ID);
$link = '<a rel="nofollow" href="mailto:?subject='.rawurlencode($subject).'&body='.rawurlencode($body).'" title="'.$text.' : '.$title.'">'.$text.'</a>';
return $link;
}