Delayed Email Deliveries

Hello,
     We have one domain that sometimes sends us emails that get delayed somewhere down the line. Sometimes it is for several hours,even more on occasion. Most times it comes right through. I am trying to figure out if it us, them or a server along the way. I found a tool that analyzes the message header but I can't really translate it. Can one of you expert folks maybe take a look and pare it down to "layman's terms"?

This message example was sent at 1:20 PM EST and was received at 2:57 AM EST.

 I have attached a file that is a screen print of the analyzer results. Some info has been redacted on the images and I have "x'd" out some info from the Receiver Header.

Here is the Receiver Header:

Received: from barracuda.betool.com (192.168.1.200) by SVR-MX01.BETOOL.COM
 (192.168.1.7) with Microsoft SMTP Server id 8.1.436.0; Fri, 10 Feb 2017
 02:56:37 -0500
X-ASG-Debug-ID: 1486713395-02776672a6cc0b0001-sWrKc7
Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com
 [67.231.154.164]) by barracuda.betool.com with ESMTP id Vp24QzSifeouaTQL for
 <xxxxx@betool.com>; Fri, 10 Feb 2017 02:56:35 -0500 (EST)
X-Barracuda-Envelope-From: xxxxx@accelaviation.com
X-ASG-Whitelist: Sender
X-Barracuda-Apparent-Source-IP: 67.231.154.164
Received: from dispatch1-us1.ppe-hosted.com (localhost.localdomain
 [127.0.0.1])      by dispatch1-us1.ppe-hosted.com (Proofpoint Essentials ESMTP
 Server) with ESMTP id 2A10F4C5F7      for <xxxxx@betool.com>; Thu,  9 Feb 2017
 18:20:14 +0000 (UTC)
Received: from pure.maildistiller.com (unknown [10.110.50.25])      by
 dispatch1-us1.ppe-hosted.com (Proofpoint Essentials ESMTP Server) with ESMTP
 id 16E078006B      for <xxxxx@betool.com>; Thu,  9 Feb 2017 18:19:54 +0000 (UTC)
X-Virus-Scanned: Proofpoint Essentials engine
Received: from mx8-us1.ppe-hosted.com (unknown [10.110.49.250])      by
 pure.maildistiller.com (Proofpoint Essentials ESMTP Server) with ESMTPS id
 62C998004F      for <xxxxx@betool.com>; Thu,  9 Feb 2017 18:19:53 +0000 (UTC)
Received: from outbound-us1.ppe-hosted.com (remote.accelaviation.com
 [96.85.91.201])      (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256
 bits))      (No client certificate requested)      by mx8-us1.ppe-hosted.com
 (Proofpoint Essentials ESMTP Server) with ESMTPS id 3BDE9440059      for
 <xxxxx@betool.com>; Thu,  9 Feb 2017 18:19:53 +0000 (UTC)
Received: from EXCH2016.AccelAviation.local (192.168.1.x) by
 EXCH2016.AccelAviation.local (192.168.1.x) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id
 15.1.544.27; Thu, 9 Feb 2017 13:19:49 -0500
Received: from EXCH2016.AccelAviation.local ([fe80::4cb5:5724:3065:648c]) by
 EXCH2016.AccelAviation.local ([fe80::4cb5:5724:3065:648c%12]) with mapi id
 15.01.0544.027; Thu, 9 Feb 2017 13:19:49 -0500
From: xxxxx<xxxxx@accelaviation.com>
To: "xxxxx@betool.com" <xxxxx@betool.com>
Subject: Sage
Thread-Topic: Sage
X-ASG-Orig-Subj: Sage
Thread-Index: AdKDAFU5Vogyk8w+Toq9rVsbJaOFMA==
Date: Thu, 9 Feb 2017 18:19:49 +0000
Message-ID: <e7eed6e9053b458b81cb29e741db0f80@accelaviation.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
x-originating-ip: [192.168.1.1]
Content-Type: multipart/related;
      boundary="_004_e7eed6e9053b458b81cb29e741db0f80accelaviationcom_";
      type="multipart/alternative"
MIME-Version: 1.0
X-MDID: 1486664393-ndMrRmqtFuw2
X-Barracuda-Connect: dispatch1-us1.ppe-hosted.com[67.231.154.164]
X-Barracuda-Start-Time: 1486713395
X-Barracuda-URL: http://192.168.1.200:8000/cgi-mod/mark.cgi
X-Barracuda-BRTS-Status: 1
X-Virus-Scanned: by bsmtpd at betool.com
Return-Path: xxxxx@accelaviation.com


Thank you
Delay.pdf