Can send but not receive messages in zoho mail

Can send but not receive messages in zoho mail

I have a new account on zoho mail, I followed all the instructions but it's not working properly, I Can only send messages but not receive messages in zoho mail, gmail returns a msg saying

"Delivery to the following recipient failed permanently:

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain  ------------------------- by  smtp.secureserver.net . [72.167.238.29].

The error that the other server returned was:
550 5.1.1 < ------------------------------> Recipient not found.  < http://x.co/irbounce >