My domain is hitowny.com and I just set up my email hosting using zoho. I have followed all the steps in the instruction and MX records of my domain have been set up. However, in the control panel, zoho told me that 

" You may not be receiving emails! The MX records of your domain is not pointed to Zoho: hitowny.com.  Learn more"

I can send emails to external email server, I can receive emails from external email server. However, I can neither send or receive email from or to the internal email address (*@hitowny.com).

Could you please help? My guess is that MX records of my domain have not been reflected in zoho's local dns server...

Thank you!