553 relaying disallowed invalid domain

553 relaying disallowed invalid domain

Hi,

I have read the previous article but i am still facing issue , I have added  all these in my domain manager under dns settings.
type : cname
host: zb14521202
value / points to : validate.zoho.com

Can you please tell me why i am still facing same issue ?
Please reply fast , its urgent.

Thanks.