Excessive delay or not delivery for Yahoo emails to Exchange mailboxes

Emails with attachments from Yahoo mail not deliver to our exchange mailboxes or receive with to much delay.The bigger the attachment the later delivery.Emails with 10MB attachments not deliver at all and "Failure Notice" message appear in yahoo mailbox.
Receive connector maximum size set to 15MB and sending same emails from gmail deliver successfully to our mailboxes.
Analyzing header of delivered Yahoo mails shows that delay occurs between internal yahoo servers:

Date: Tue, 17 Oct 2017 06:00:02 +0000
From: test <test@yahoo.com>
To: =?UTF-8?B?2YbbjNmF2Kcg2LTYp9uM2YI=?= <test@mydomain.com>
Message-ID: <...@mail.yahoo.com>
Subject: 929
MIME-Version: 1.0
Content-Type: multipart/mixed;
    boundary="----=_Part_322010_1330634417.1508220003126"
Content-Length: 5861292
Received-SPF: Pass (...)
 client-ip=74.6.129.41; helo=sonic301-2.consmr.mail.bf2.yahoo.com;
X-MS-Exchange-Organization-Antispam-Report: DV:3.3.16312.857;SID:SenderIDStatus Pass;OrigIP:74.6.129.41
X-MS-Exchange-Organization-SCL: 0
X-MS-Exchange-Organization-SenderIdResult: PASS
X-MS-Exchange-Organization-AuthSource: edg.mydomain.com
X-MS-Exchange-Organization-AuthAs: Anonymous

Pay attention to "Date" header and delay in receiving email from from sonic.gate.mail.ne1.yahoo.com to sonic301.consmr.mail.bf2.yahoo.com with HTTP in "Received" header which is almost 12 minute.
Obviously Sending email from yahoo to gmail don't suffer from such problem but the different internal yahoo server are in use in that.

Update:
Blow is the returned "Failure Notice" email to Yahoo mailbox:

Received-SPF: none (domain of sonic309-13.consmr.mail.bf2.yahoo.com does not designate permitted sender hosts)
Date: Tue, 17 Oct 2017 10:39:57 +0000
From: MAILER-DAEMON@yahoo.com
To: test@mydomain.com
Message-ID: <829224876.370562.1508236797219@sonic309.consmr.mail.bf2.yahoo.com>
Subject: Failure Notice
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Content-Length: 30563

Sorry, we were unable to deliver your message to the following address.

<test@mydomain.com>:
Unable to deliver message after multiple retries, giving up.

--- Below this line is a copy of the message.

DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1508236495; bh=05+txvVD/0X1C1jzEbs51ITk3qlI/U56iABbC6omHQc=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject; b=mDp0ROYHIb64wmkZedr5AJ5Tr+D0DBAlQ8E2oW5ZO7V/BzqYof89/le/xR4xdUiRCMCJ0fDKNFFcs54nsgCt/QJ092SpLvkvBoFP37Y5TU0OWOH7M8zmoIAcyfYLQyC9HReYaWgcwkWyD6d70AXwOyE93ReApl46xo3+/ocm8zugO7T5RqtrsQmK5Ufr0GKo7scE6q9K0Crfcdke2FX3xQ55Xctr/JW4R+5KUgmw4iKZzOmlvz7XTj4baSp5fkNURkKkjViihYyZnjzdu2Wdi4mZaLMxFWmaTy3aUBOtvptJTG18if3zNcqCtWmQQEsyU4wTRGd/p8hfCygb0cly2g==
X-YMail-OSG: 8U.aQjsVM1nQWEX9W4_6faDyxdY3HwSgCPyG5deJnM2q5PD8vG8Dz6FJPMm4gVa
 fNvkk6oB8kwLRbFQ98skbWm2v5zzaEbRehoj7fEZtylioWiy4D13HNYIdX42sY.OXj1K5jRkFGiw
 IW56WSiD652kP.yuOzuNE5_mADT5Bry4g.M_Lhfpsg42.hTW0xsYAyFac0UWeLTUy6tLjWBSaLbb
 lGcyjCeGY58ifsKrc8zNfiZsdHiYt35.XT8oBiMEKppl6KUpTXfnthUTqmb1ZrcIJyTDPs4xYqna
 REbEHPqyBSgAUa8dScrwFvcdrQfshXmiIEfU.Wd35A4OKVZYZxzDnQ8TuK5ttXpigMwna7bq_tvZ
 DncMPlWs7PuVcBdrDLkW2ID0_8U5eRsXz6yzTVkwSQYFppDOlxxoQiHLx9b5dbNP76OShzk8hhO3
 nwe8cn.EN_Q.RMkN4HlajXaGziE.7SH5XPurm.NXGkHm_Zdxz17O0JAj86Wg-
Received: from sonic.gate.mail.ne1.yahoo.com by sonic309.consmr.mail.bf2.yahoo.com with HTTP; Tue, 17 Oct 2017 10:34:55 +0000
Date: Tue, 17 Oct 2017 07:36:05 +0000 (UTC)
From: test <test@mydomain.com>
To: =?UTF-8?B?2KzZiNin2K8g2LTYudin2LnbjA==?= <test@mydomain.com>
Message-ID: <1001794763.351576.1508225766737@mail.yahoo.com>
In-Reply-To: <2076977144.308793.1508219707757@mail.yahoo.com>
References: <2076977144.308793.1508219707757.ref@mail.yahoo.com> <2076977144.308793.1508219707757@mail.yahoo.com>
Subject: Fw: scasdfddd
MIME-Version: 1.0
Content-Type: multipart/mixed; 
    boundary="----=_Part_351575_1109119668.1508225766737"
X-Mailer: WebService/1.1.10774 YMailNorrin Mozilla/5.0 (Windows NT 6.3; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0
Content-Length: 11219432

------=_Part_351575_1109119668.1508225766737
Content-Type: multipart/alternative; 
    boundary="----=_Part_351568_178096500.1508225765923"

------=_Part_351568_178096500.1508225765923
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

   ----- Forwarded Message ----- From: test <test@mydomain.com>To: =
=D8=AC=D9=88=D8=A7=D8=AF =D8=B4=D8=B9=D8=A7=D8=B9=DB=8C <test@mydomain.com>
Sent: Tuesday, October 17, 2017, 9:25:08 AM GMT+3:30Subject: scasdfddd
 dfdsfsffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
 =20
------=_Part_351568_178096500.1508225765923
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<html><head></head><body><div style=3D"font-family:Helvetica Neue, Helvetic=
a, Arial, sans-serif;font-size:13px;"><div></div>
            <div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa<br></div><div><br></div>
           =20
            <div id=3D"ydp23e139d9yahoo_quoted_8242600409" class=3D"ydp23e1=
39d9yahoo_quoted">
                <div style=3D"font-family:'Helvetica Neue', Helvetica, Aria=
l, sans-serif;font-size:13px;color:#26282a;">
                    <div>----- Forwarded Message -----</div>
                    <div><b>From:</b> test &lt;test@mydomain.com&gt=
;</div><div><b>To:</b> =D8=AC=D9=88=D8=A7=D8=AF =D8=B4=D8=B9=D8=A7=D8=B9=DB=
=8C &lt;test@mydomain.com&gt;</div><div><b>Sent:</b> Tuesday, October 17,=
 2017, 9:25:08 AM GMT+3:30</div><div><b>Subject:</b> scasdfddd</div><div><b=
r></div>
                    <div><div style=3D"font-family:Helvetica Neue, Helvetic=
a, Arial, sans-serif;font-size:13px;"><div>dfdsfsffffffffffffffffffffffffff=
ffffffffffffffffffffffffffffffffffffff<br></div></div></div>
                </div>
            </div></div></body></html>
------=_Part_351568_178096500.1508225765923--

------=_Part_351575_1109119668.1508225766737
Content-Type: application/pdf
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="Microsoft Lync Server 2013  Step by
 Step for Anyone_REV014.pdf"
Content-ID: <b088c57a-957b-2761-59c8-16dcf0766adc@yahoo.com>
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[remainder of message body omitted; too large]

Excessive delay or not delivery for Yahoo emails to Exchange mailboxes

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