Filtering the WordPress email address

email_filters.php

<?php

function site_mail_from(){
    $admin_email = get_option('admin_email');
    return $admin_email;
};

add_filter('wp_mail_from', 'site_mail_from');

function site_mail_from_name(){
    $site_name = get_bloginfo( 'name' );
    return $site_name;
};

add_filter('wp_mail_from_name ', 'site_mail_from_name ');