Unable to send message;Reason:553 Relaying disallowed. Invalid Domain

Unable to send message;Reason:553 Relaying disallowed. Invalid Domain

I learned the following records in cPanel

gmgautocenter.com.br. 14400 TXT
zoho-verification=zb14649869.validate.zoho.com  

gmgautocenter.com.br. 14400 TXT
zoho-verification=zb14649869.zmverify.zoho.com  

zb14649869.gmgautocenter.com.br. 300 CNAME
zmverify.zoho.com