This is usually done by changing the MX (Mail Exchange) records on your domain. This tells you more: https://www.godaddy.com/help/add-an-mx-record-19234
Also, GoDaddy is such a presence in domain registration asphost may have instructions on their site, as well.
Or, you can make it easy on yourself and talk to our experts at the link below (I do when I'm stumped).
I hope that helps,
Thomas D. - GoDaddy | Community Moderator
24/7 support available at x.co/247support