@danibarzo16i718 please use the 
Edit button rather than creating multiple posts in the future, thanks. I’ve merged your posts into one for you this time.
If it’s all in the app then you don’t need access to email at all, right?
For example, the customer places an order through your app and that order gets sent to some backend service - in this case let’s say Airtable. You could then use something like IFTTT or Integromat to send an email to the store/service provider with the order details.