I'm trying to send emails from my server  with user info@mysite.com  to bh-fn@mysite.com, but zoho bounces them all with the message:

<bh-fn@mysite.com>: host mx.zoho.com[136.143.190.121] said: 554 5.2.3
    MailPolicy violation Error delivering to mailboxes (in reply to end of DATA
    command)

Can't really understand  what does this error mean. I posted a private request 15 hours ago, but it seems nobody would answer. Can you help with resolving the issue with zoho email?