not able to receive any email after upgrade to paid plan.

not able to receive any email after upgrade to paid plan

The response from the remote server was:

552 5.1.1 <info@xxx.com> Mailbox delivery failure policy error

Final-Recipient: rfc822; info@xxx.com
Action: failed
Status: 5.1.1
Remote-MTA: dns; mx.zoho.com . (204.141.32.121, the server for the domain xxxxx.com .)
Diagnostic-Code: smtp; 552 5.1.1 < info@xxxx.com > Mailbox delivery failure policy error
Last-Attempt-Date: Thu, 20 Jul 2017 04:16:25 -0700 (PDT)

---------- Forwarded message ----------
From: KS-9X <xxxxx@gmail.com>
To: info@xxxxx.com
Cc:
Bcc:
Date: Thu, 20 Jul 2017 16:46:22 +0530
Subject: test4