Exchange 2010 - Delay in email received

I'm experiencing delays from email coming from a specific domain.  I don't believe the issue lies with our server, but sense the delay is from two different domains, I wondered whether there was something in our server that was causing this delay. Below is some of the header information for the delayed emails:


Email 1:
Received: from mout.perfora.net (74.208.4.194) by mail.ndapc.com
 (192.168.0.51) with Microsoft SMTP Server id 14.1.218.12; Sun, 2 Oct 2016
 16:05:02 -0400
Received: from ACCOUNTINGD ([50.194.177.237]) by mrelay.perfora.net
 (mreueus002) with ESMTPA (Nemesis) id 0Lyk9B-1atNOy3RyR-0164fq; Fri, 30 Sep
 2016 20:29:59 +0200

X-Mailer: Microsoft Outlook 15.0
Thread-Index: AQJqvjSho+4cY93Ge3gFg/Wwc7dhmgJrPM00n024eSA=
Content-Language: en-us

X-Provags-ID: V03:K0:fdKutpUo4RhL9KXGvArE8OHqEvZ3O5X0d39Vo8jDw7dIzoJ92AC
 IdZi8x6dpZpW/H2rNZOqyQZpO/0QZUC0V8BFHZmVdGHDTJT2uoRgGaJn4WOjyCPdNPIygdY
 XBy1+bsVrvb5D+G9CiM9gvEKZmr90t3QM2IsZFMwnr2LHUjxmJ2PxV4W0zkTzHRIYX7CMEc
 5NGIWw7OemXgbVUnoU8WA==
X-UI-Out-Filterresults: notjunk:1;V01:K0:TiTPIGTN8fs=:9E5QPyq/oIe0VRP5PrFdbS
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 9sTF2OwE92QNO1lj

X-MS-Exchange-Organization-AuthSource:
X-MS-Exchange-Organization-AuthAs: Anonymous
X-GFI-SMTP-Submission: 1
X-MS-Exchange-Organization-PRD: stoaintl.com
X-MS-Exchange-Organization-SenderIdResult: None
Received-SPF: None (    does not designate
 permitted sender hosts)
X-GFI-SMTP-Submission: 1
X-GFI-SMTP-HelloDomain: mout.perfora.net
X-GFI-SMTP-RemoteIP: 74.208.4.194
X-MS-Exchange-Organization-Antispam-Report: SenderOnRecipientSafeSendersList
X-MS-Exchange-Organization-SCL: -1



Email 2:

Received: from s12p02o141.mxlogic.net (208.65.145.64) by mail.ndapc.com
 (192.168.0.51) with Microsoft SMTP Server id 14.1.218.12; Fri, 30 Sep 2016
 16:58:44 -0400
Received: from unknown [96.56.33.53] (EHLO UB03.ubprop.com)      by
 s12p02o141.mxlogic.net(mxl_mta-8.5.0-1466)      with ESMTP id
 c13dee75.7fc6ce1fc700.23146.00-544.64094.s12p02o141.mxlogic.net
 (envelope-from <jorleman@ubproperties.com>);      Fri, 30 Sep 2016 15:03:24 -0600
 (MDT)
X-MXL-Hash: 57eed31c1c75c2dd-17bdaaf2ec4e339f3ce39332458fb6b9527c55c4
Received: from unknown [96.56.33.53] (EHLO UB03.ubprop.com)      by
 s12p02o141.mxlogic.net(mxl_mta-8.5.0-1466) over TLS secured channel      with
 ESMTP id 5be4de75.0.35925.00-333.100478.s12p02o141.mxlogic.net (envelope-from
 <    >);      Thu, 29 Sep 2016 11:26:13 -0600 (MDT)
X-MXL-Hash: 57ed4eb551d94569-cc519633019a756e7aa785422196a6fd9d088813
Received: from UB03.ubprop.com ([fe80::e575:47e0:63f0:f08f]) by
 UB03.ubprop.com ([fe80::e575:47e0:63f0:f08f%13]) with mapi id 14.02.0328.009;
 Thu, 29 Sep 2016 13:26:12 -0400

Thread-Index: AdIaZLmy6LHU7RjLQ2Catj7VIaHPqAADUcfyAAAzt/AAAPDS8A==
Date: Thu, 29 Sep 2016 17:26:12 +0000
Message-ID: <7A21F3C2-D083-4C0C-B323-9F113DE8A442@ubproperties.com>
References: <2424137C-0872-4294-ADB1-55D84FDD097D@ubproperties.com>
 <ED4D8A01-AE4D-4044-A04D-66EB00B6229B@ubproperties.com>,<DM2PR04MB1851278FD3F37085C58B2278B2CE0@DM2PR04MB1851.namprd04.prod.outlook.com>
In-Reply-To: <DM2PR04MB1851278FD3F37085C58B2278B2CE0@DM2PR04MB1851.namprd04.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-AnalysisOut: [v=2.1 cv=ReuWfgZv c=1 sm=1 tr=0 a=VZ+C9M41iubXZmT/EKwz6w==]
X-AnalysisOut: [:117 a=VZ+C9M41iubXZmT/EKwz6w==:17 a=kj9zAlcOel0A:10 a=xqW]
X-AnalysisOut: [C_Br6kY4A:10 a=GW1xBdLrtEIA:10 a=FJA1PnO1AAAA:8 a=xFkcl9sD]
X-AnalysisOut: [AAAA:8 a=3oc9M9_CAAAA:8 a=Kl3Z8SwrwPVNRRcY8dQA:9 a=yO-S9Wo]
X-AnalysisOut: [B2xLQcHSt:21 a=QZ7x49gEzHQ1JYKH:21 a=CjuIK1q_8ugA:10 a=q7-]
X-AnalysisOut: [djQggoAkA:10 a=cjjtZJ1ZH2wA:10 a=zF-lripLtB8A:10 a=JAKdFTT]
X-AnalysisOut: [65_LX2izJ9qDR:22 a=31gl-k8mzNzjL2ROS0WW:22 a=WQP3B-o2DcFb_]
X-AnalysisOut: [-ao3AbR:22]
X-Spam: [F=0.5987312666; CM=0.500; MH=0.598(2016093018); S=0.200(2015072901)]
X-MAIL-FROM: <jorleman@ubproperties.com>
X-SOURCE-IP: [96.56.33.53]


X-MS-Exchange-Organization-AuthAs: Anonymous
X-GFI-SMTP-Submission: 1
X-MS-Exchange-Organization-PRD: ubproperties.com
X-MS-Exchange-Organization-SenderIdResult: None

X-GFI-SMTP-Submission: 1
X-GFI-SMTP-HelloDomain: s12p02o141.mxlogic.net
X-GFI-SMTP-RemoteIP: 208.65.145.64
X-MS-Exchange-Organization-Antispam-Report: SenderOnRecipientSafeSendersList
X-MS-Exchange-Organization-SCL: -1