I want to provide email service to my users

[Mohit_garg]

I want to provide email automation service through my app but I am not able to figure out how can I send emails on behalf of store owner every time someone buy from his store. Is their any SDK or library someone know please help me in that

[Ugurcan]

There is not such an API under Shopify. You need to create it in your app using AWS or some other infrastructure provider.

[Mohit_garg]

Can you help in that if their is any documentation or youtube video available?

[Ugurcan]

Depending on how you are developing your app and which language you are using, you can search for tutorials on in the internet, or perhaps YouTube.  It is not really Shopify related.

[Mohit_garg]

Can you help me over this 
https://community.shopify.com/c/shopify-apps/shopify-node-app-oauth/td-p/2145256