deleted mail hosting can not send mail

Hello

I deleted mail hosting before twelve hours ago Now

Send the mail still to this error message

Could you please check.

mail back

伺服器的回應如下：

553 Relaying disallowed

Final-Recipient: rfc822; ricky@kb-ent.com.tw
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx.zoho.com. (8.40.222.121, the server for the domain kb-ent.com.tw.)
Diagnostic-Code: smtp; 553 Relaying disallowed
Last-Attempt-Date: Sat, 16 Sep 2017 19:32:12 -0700 (PDT)

Thank you in advance,

Regards,