Email neither being sent to or received in mail

Email neither being sent to or received in mail

I have setup the email account of my domain slgeneration.com in my zoho. I did add the CNAME and setup the MXRecords. But the problem is that I cannot send any email to this domain email and I am not receiving any email at this mail. When ever I try to send a mail to this email support@slgeneration.com the mail bounce back to the sender mail showing this error : 
This message was created automatically by mail delivery software. 
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. 

support@slgeneration.com INVALID_ADDRESS, ERROR_CODE :553, ERROR_CODE :Relaying disallowed 



Received:from mail.zoho.com by mx.zohomail.com 
    with SMTP id 1523360965035560.7222598812336; Tue, 10 Apr 2018 04:49:25 -0700 (PDT) 
Message-ID:<162af63a1a5.11937f4a129843.3694646998217435774@teamioss.com> 
Date:Tue, 10 Apr 2018 17:19:25 +0530 
From:Sabin Chacko <sabin@teamioss.com> 
User-Agent:Zoho Mail 
To:"support" <support@slgeneration.com> 
Subject:test 
Content-Type:multipart/alternative; 
    boundary="----=_Part_97135_1179880830.1523360965030"

Please help me to fix this.