Wordpress email reply back to the original post author

So, I don't know how to explain properly, but here is the current situation.

Let say the site is called "Demo.com" and site admin email is "admin@gmail.com"

Then,

1. An author(example, user-X@gmail.com) posts a post.


2. a visitor (another user, user-Y@gmail.com) leaves a comment or reply on the post.


3. the author(user-X) gets an email notification.

Here is the thing.

The email sender is the admin "admin@gmail.com" and not the visitor.

Thus, when the author tries to reply back directly from the email, he is replying back to the "admin@gmail.com" and not "user-y@gmail.com".

How can I change it so that the reply can be sent to the original viewer (user-y)?

Any suggestions?