Hi,
Well, we can for sure help for technical questions related to HikaShop but in your case it is really custom development and not fully related to HikaShop.
Even if you want to interact with the HikaShop emails ; the all algorithm and processing is related to extra parameters which are not related to us or our support.
For the part which have to handle the parameters and the session ; I would more recommend you to find some help in the Joomla forum.
But if you have issues with the email address modifications ; feel free to contact us.
Now, when you want to completely change who will receive the email ; you need to change the variable
To be sure that you will only modify specific email ; please read the content of
It contains the "mail name" ; so you will know if it is a "order_admin_notification", a "order_creation_notification", or a "contact_request", etc.
Otherwise, you might modify the order notifications to the customer and notify too much your "vendors" with emails they don't need to receive.
Regards,