Send automatic emails with attachment post payment

[Ophélie]

Hi there, 

I am selling an online product, therefore I would need my clients to receive after the payment an email with instructions + the document they bought to download. 

I am looking at a tool that would allow me to do so? Feel free to reply if you have any ideas. 

Best,

[IP1999]

You may find your answer here

https://help.shopify.com/en/manual/products/digital-service-product