ZOHO mail has been verified to be "registering" new domains with their email services without the actual owners knowledge. Once this fraud is detected, there will be an email like this returned when you contact them:
Dear (user),
Greetings from Zoho Mail Team!
As we checked with the details, it looks like the domain which you have mentioned already added with us and verified with us. The super admin for the domain is zzz[at]zzz[dot]com.
So if you are the owner of the domain, kindly send an email to support[at]zohomail[dot]com with the domain registration details and with the domain registration date and expiration date. So that we can analyze and help you.
Please feel free to get back to us for any further clarifications.
Regards,
Hemanth Kumar
Please report these violations to your web site registration firm immediately.