Change the "Reply-To" for emails sent to admin [Paid Memberships Pro]

change-pmpro-reply-to.php

<?php
/**
 * Add this code to your PMPro Customizations Plugin or via a code snippets plugin.
 */
 
 function my_pmpro_adjust_reply_to_email( $headers, $email ) {
    
    // Add "Reply-To" header and set it to the user that just cancelled.
   if( strpos($email->template, "_admin")) {
        $headers[] = "Reply-To: " . $email->data['user_email'];
    }
       
	return $headers;
}
add_filter( 'pmpro_email_headers', 'my_pmpro_adjust_reply_to_email', 10, 2 );