change_admin_emails.php

<?php
/**
 * This sends PMPro admin emails to another email.
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

//Change PMPro admin email
function my_pmpro_forward_admin_emails($recipient, $email)
{
  if(strpos($email->template, '_admin'))
       $recipient = '[email protected]';	
	return $recipient;
}
add_filter("pmpro_email_recipient", "my_pmpro_forward_admin_emails", 10, 2);