Wordpress: Change default from name & email filters

gistfile1.php

<?php 
function my_wp_mail_from_name($name) {
    return 'From Name';
}
//email from email function
function my_wp_mail_from($content_type) {
  return '[email protected]';
}
add_filter('wp_mail_from','my_wp_mail_from');
add_filter('wp_mail_from_name','my_wp_mail_from_name');

?>