From Website Inquiry to Support tickets

From Website Inquiry to Support tickets

The contact us form we are using is here:  http://www.walkintour.com/#!contact/c24vq

When A@abc.com submit a form, an email will be sent to support@walkintour.com, which is linked with Zoho Support.

However, the email is from no-reply@xyz.com instead of from A@abc.com.
The content of the email mentions A@abc.com sent us a request.

Zoho support now thinks no-reply@xyz.com is a person contacting us. How can I configure it properly so that Zoho Support will be smart to know the person asking the question is A@abc.com instead?

Thank you.