Mailbox delivery failure policy error (in reply to RCPT TO command)

Mailbox delivery failure policy error (in reply to RCPT TO command)

Hello,

I send emails from my real estate boards system to people that have opted in to receive emails from me. I've been getting these emails for my clients.  Will you please check into this and see if you can fix it please!

This is the mail system at host smtp.wfrmls.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<My Email>: host mx.zohomail.com[74.201.155.125] said: 552 5.1.1
   <My Email> Mailbox delivery failure policy error (in reply to
   RCPT TO command)
Reporting-MTA: dns; smtp.wfrmls.com
X-Postfix-Queue-ID: CF5F421E02E7
X-Postfix-Sender: rfc822; My Email
Arrival-Date: Tue, 12 Apr 2016 07:05:50 -0600 (MDT)

Final-Recipient: rfc822; "My Email"
Original-Recipient: rfc822;"My Email"
Action: failed
Status: 5.1.1
Remote-MTA: dns; mx.zohomail.com
Diagnostic-Code: smtp; 552 5.1.1 <"My Email"> Mailbox delivery
   failure policy error

From: David  <"My Email">
Subject: Homes Matching Your Criteria
Date: April 12, 2016 at 7:05:50 AM MDT
To: David  <"My Email">
Reply-To: David <"My Email">