Allow other receiver/business email addresses for PMPro IPN Messages.

my_pmpro_ipn_check_receiver_email.php

<?php
/**
 * Allow other business email addresses for PMPro IPN Messages.
 * To add this code to your site you may follow this guide - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_ipn_check_receiver_email($check, $email) {
	
	if ( in_array( 'bbb@gmail.com', $email ) ) { //change email here to the old email
		$check = true;
	}
	
	return $check;
}
add_filter('pmpro_ipn_check_receiver_email', 'my_pmpro_ipn_check_receiver_email', 10, 2);