Unable to receive emails

Unable to receive emails

Hi,

One particular email account cannot receive an email.
Sender gets the following error:

The response from the remote server was:

554 5.2.3 MailPolicy violation Error delivering to mailboxes


Final-Recipient: rfc822; raghavendra.ellur@bellusmantra.com
Action: failed
Status: 5.2.3
Remote-MTA: dns; mx.zoho.com. (216.52.72.121, the server for the domain bellusmantra.com.)
Diagnostic-Code: smtp; 554 5.2.3 MailPolicy violation Error delivering to mailboxes
Last-Attempt-Date: Sun, 26 Mar 2017 12:34:33 -0700 (PDT)