Domain has exceeded the max emails per hour 2/2

Domain has exceeded the max emails per hour 2/2

Hi, we received this bounce mail. Would like to find out why the limit is so low at 2?

Is this a problem on the server sending out PHPMailer mails to this group address, shop@sharefood.sg?

Cheers,

----
From: Mail Delivery System [mailto: Mailer-Daemon@cgi.cloudgantry.com ]
Sent: Tuesday, 24 January 2017 10:25 PM
To: Share Food Shop < shop@sharefood.sg >
Subject: Mail delivery deferred: returning message to sender

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a temporary error. The following address(es) deferred:

   ibonie@hotmail.com
    Domain  sharefood.sg  has exceeded the max emails per hour (2/2 (100%))
allowed.  Message will be reattempted later

------- This is a copy of the message, including all the headers. ------
------ The body of the message is 9357 characters long; only the first
------ 5000 or so are included here.
Received: from shrfd2016 by  cgi.cloudgantry.com  with local (Exim 4.87)
        (envelope-from < shrfd2016@cgi.cloudgantry.com >)
        id 1cW21Q-0005O4-13
        for  ibonie@hotmail.com ; Tue, 24 Jan 2017 22:24:32 +0800
To:  ibonie@hotmail.com
Subject: Your Share Food order receipt from 24th January 2017
X-PHP-Script:  blog.sharefood.sg/wp-admin/admin-ajax.php  for 182.55.58.245,
182.55.58.245
Date: Tue, 24 Jan 2017 14:24:32 +0000
From: Share Food Shop < shop@sharefood.sg >
Message-ID: < b8b7e9e57c5b7590d52b2cb5925f36ad@blog.sharefood.sg >
X-Mailer: PHPMailer 5.2.22 ( https://github.com/PHPMailer/PHPMailer )
MIME-Version: 1.0
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit