My client was facing an issue that there all notification was going on SPAM folders.
A missing SPF record on the www.yourdomainname.com is the root of the problem. You can check this in the Google Admin Tool Box Dig command. Here are the TXT records for the Domain Name
The record required to do that is a TXT record with the value:
v=spf1 include:shops.myshopify.com ~all
If that netcore.co.in domain is your email host, you can include it like so:
v=spf1 include:shops.myshopify.com include:netcore.co.in ~all
If there’s anything else I can help with, please do let me know on tejashweta@gmail.com
You can also check on shopify Admin