When sending email to zoho, I get delivery failure notice as below,

The error that the other server returned was:
550-Please turn on SMTP Authentication in your mail client.
550-mail-io0-f171.google.com  [209.85.223.171]:36015 is not permitted to relay
550 through this server without authentication.

Please help.

While my domain already says verified, i dont see the  CNAME file added to my Godaddy account. Would this be a proble?

Please help.

Thanks

Jay