Bounce back from gmail

Bounce back from gmail

One of my customers gets an error when sending to both of our domains fitsupply.com and discountonlinefitness.com with a 17mb zip file of images included.
Here is the error:

---------- Forwarded message ----------
From: Mail Delivery Subsystem <mailer-daemon@googlemail.com>
Date: Wed, Oct 1, 2014 at 12:07 PM
Subject: Delivery Status Notification (Failure)
To: garthbrinkley@gmail.com


Delivery to the following recipient failed permanently:

     steve@discountonlinefitness.com

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain discountonlinefitness.com by mx.zohomail.com. [74.201.154.201].

The error that the other server returned was:
554 5.2.3 MailPolicy violation Error delivering to mailboxes


----- Original message -----

DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type;
        bh=ri8JbXZrFt2EQeYgEcTF0s8nKhMGTOHi9JCgwLLyUTs=;
        b=thq1tOmBP443tONHvMFV3tLhIkH21+ovZdr6Aq+TavTsjMUhiv1gv8+3f/dtxByKkB
         zUf6/dZXBdM+bUr3k7Dnwr0OI0cy4YuzV2gdOEcfARppTBlafPRq7XcM1H74zTc73gSw
         XLSdrevnp9KlABYVXSdmtUZe25tdVUobmeIZrk+FtPNbfAWE+ARNWIZNWr2w73/jgGc/
         v76eqJ/tvED4LQ/tFWeur76Xx72KEYxvWv/kTjDQmt7kOdxaZUuAcMLd0MWOUuCXfwGs
         2tgVGz8IocTvli5buLyjNDNn8t8Jz/NDDIMus3/Y+LIcv7NfSbYxjfiq41wvkKNDrut5
         CtXw==
MIME-Version: 1.0
X-Received: by 10.182.71.104 with SMTP id t8mr21074499obu.71.1412179574404;
 Wed, 01 Oct 2014 09:06:14 -0700 (PDT)
Received: by 10.60.116.3 with HTTP; Wed, 1 Oct 2014 09:06:13 -0700 (PDT)
In-Reply-To: <CADU46MiHLx3iOAh8gB5BrVX+iUFda533C1-n2G2Yjwx36A-tdQ@mail.gmail.com>
References: <CADU46MiHLx3iOAh8gB5BrVX+iUFda533C1-n2G2Yjwx36A-tdQ@mail.gmail.com>
Date: Wed, 1 Oct 2014 12:06:13 -0400
Message-ID: <CADU46MghUN-aNtpXN3F72D1TpUaypn7aGb=nZMBhfrNRnSsVkA@mail.gmail.com>
Subject: Fwd: Used equipment in DFW area
From: Garth Brinkley <garthbrinkley@gmail.com>
To: steve@discountonlinefitness.com
Content-Type: multipart/mixed; boundary=e89a8fb1ea68efd1d905045ead1f