Cloudflare mail service exposing origin ip

[fakemasked]

Hey guys you know well that cloudflare's email only works with dns only so when someone want to ddos they can check ip using mail.domain.com

So there is any method or solutions that can help to hide or leaking orignal ip address Without losing email service
@Zer01ne or anyone kindly help

What is Enxf Doing for hiding there original ip