Thank Trevor. Though your email forwarding solution cannot apply to our case because many of our users may even don't have an email. They just want to buy some products from our website, and we cannot force them to register a new email for this purpose.
... You have a hook for such code at the point that order statuses change - see http://www.konakart.com/configurationfaq.php#how_can_i_make_something_happen_when_an
I looked the link above. It mentions ORDER_INTEGRATION_CLASS. So I need to change "Admin->Configuration>>Stock and Orders>>Order Integration Class" pointing to my class.
Can my class derive from com.konakart.bl.OrderIntegrationMgr, and reuse its saveOrder() method, plus my own logic? Do you have any samples?
I'd strongly suggest that in the later KK version, use Username as unique ID for login, and email as optional. Because in many countries, email is not so penetrated as in UK and US, esp for elder pepple. I'm in US, but one of our project's big markets is in Asia. I need think again if KK is best for our application.
Please give what your managment thinks. Thank you!
-Bruce