mymail.php

<?php
/*
 * Plugin Name: My Name Email
 * Description: Use custom email From Name
 * Plugin URI:  http://toscho.de/?p=2201
 * Version:     2015.01.28
 * Author:      Dody Rachmat Wicaksono
 * Author URI:  http://www.dodyrw.com
 * License:     GPL
 */
 
 function dd_use_my_email(){
  return 'this_is_your_email@domain.com';
}

add_filter( 'wp_mail_from', 'dd_use_my_email' );