Email spam ?

Hi @amar2119

Thank you for reaching out!

There are several reasons why your customer is receiving the order notification email in his spam folder instead of Inbox folder.

I would suggest checking the below articles that mention different solutions to this issue:

1. How to Stop WooCommerce Emails Going to Spam?
2. 7 Reasons and Fixes for WordPress WooCommerce Emails Going to Spam Folder

I hope this helps!