I think I have successfully setup my MX records.  I added in priority 10, 20 and 50, and  mx.zoho.com,  mx2.zoho.com and  mx3.zoho.com respectfully.  There are no other MX records present.  

I can send but still am not receiving any emails if I directly send an email from another service provider to my account here at Zoho.  I sent a few emails from Zoho to a gmail account, I replied to those emails and Zoho only received one of those emails.  The other replies came back with delivery failure.

The domain is www.myketochef.com and is hosted on Hostgator.  Do you know what the issue could be?