Zoho Mail not receiving email from Website.

Zoho Mail not receiving email from Website.

I have subscribed to Zoho Mail. I run a website desiging company.
I have few websites www.adminfotek.com, unisunmarketing.in and unisunwebservices.in 
These websites are hosted in Hosting Raja Linux server shared. 
In Contact us page if a visitor fills up the contact form and submits he gets a message succesfully sent message. 
But the message is not received in my Zoho email. 

Hosting service Hosting Raja client support tells us that the email must be domain specific(gmail cannot be used) and the email account must be in the same server as the website is hosted. So If I have a domain I cannot use zoho emails as my website visitors cannot contact me. 

I have tested this on Hostgator server also the problem remains.

Requested Zoho mail support for solution but received nil response.


Regards,

Naresh Chandra
9000300752