Error receiving shopify notifications

Error receiving shopify notifications

I get this message when i send test email notifications from shopify and i get this error when i try to send emails through shopify to customers. 

This is the mail system at host smtp.shopify.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

<contact@zjonthego.com>: host mx.zoho.com[204.141.42.121] said: 554 5.2.3
MailPolicy violation Error delivering to mailboxes (in reply to end of DATA
command)
Reporting-MTA: dns; smtp.shopify.com
X-Postfix-Queue-ID: 273A117F525
X-Postfix-Sender: rfc822; contact@zjonthego.com
Arrival-Date: Sun, 9 Feb 2020 08:47:45 +0000 (UTC)

Final-Recipient: rfc822; contact@zjonthego.com
Original-Recipient: rfc822;contact@zjonthego.com
Action: failed
Status: 5.2.3
Remote-MTA: dns; mx.zoho.com
Diagnostic-Code: smtp; 554 5.2.3 MailPolicy violation Error delivering to
mailboxes

Return-Path: <contact@zjonthego.com>
X-Path-Id: 273A117F525
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=shopify.com; s=mail;
    t=1581238065; bh=1bbs/pwBfp7trkb0r9ZQJuNgALfuWCqL0xSPAn0qAmE=;
    h=Date:From:To:Message-ID:Subject;
    b=Us6+mz0/KgS9XcL+zUaHLzo4YoC4CUqMERut3js1P1xm7j72SED1ny5cY+rX6XGM3
     0d80Q77s+q1vZSccAeIb97uUvW14yj2V5KJ6nnUpilxINeorIJaaBQcmrDWgKyYAkf
     6ybVUBL8cMXJ1LdesuZ7duMPbmdJY/Wq6QmzfZjc=
X-Path-Id: 0E30060006
Date: Sun, 09 Feb 2020 08:47:45 +0000
From: ZJ on the Go <contact@zjonthego.com>
To: MaryMargaret Bryant <contact@zjonthego.com>
Message-ID: <5e3fc7317664_134a33febab0cd998618be@shopify.com>
Subject: [ZJ on the Go] Order #1001 placed by Betty Turnley
Mime-Version: 1.0
Content-Type: multipart/alternative;
boundary="--==_mimepart_5e3fc73172a9_134a33febab0cd99861772";
charset=UTF-8
Content-Transfer-Encoding: 7bit
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