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exchange email rejected

Posted on 2014-10-20
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Last Modified: 2014-10-20
I am running exchange 2013.  We have a website where we are advertising a live streaming event.   People can then enter their email address and their friends email adders to send an evite.  When the server sends the email, the email go to the name specified and the from is the person who entered their email address. Looks like somewhere there's a problem, as people, I think everyone are getting their emails returned back to them.  Here's the error message, I'm trying to figure out if it's my problem, or is it yahoo's problem or who's ever email provider they are using.

I changed my domain name to @mydomain.org, but can someone validate if this is my problem with exchange, or yahoo's issue?

Thanks, Dan



On Thursday, October 16, 2014 9:19 PM, Mail Delivery System <Mailer-Daemon@mail.mydomain.org> wrote:

This message was created automatically by the SMTP relay on mail.myDomain.com.org.
 
A message that you sent could not be delivered to all of its recipients.
The following address(es) failed:

  dickwilson822@yahoo.com
    SMTP error from remote mail server after end of data:
    host mta6.am0.yahoodns.net [98.138.112.34]: 554 5.7.9 Message not accepted for policy reasons.  
      See http://postmaster.yahoo.com/errors/postmaster-28.html

------ This is a copy of the message, including all the headers. ------

Return-path: <daveekstrom@yahoo.com>
Received: from [74.116.125.253] (port=57387 helo=levi)
    by mail.myDomain.com.org with esmtp (Exim 4.82_1-5b7a7c0-XX)
    (envelope-from <daveekstrom@yahoo.com>)
    id 1Xf1K9-0000A3-2x
    for dickwilson822@yahoo.com; Thu, 16 Oct 2014 23:47:41 -0700
MIME-Version: 1.0
From: daveekstrom@yahoo.com
To: dickwilson822@yahoo.com
Reply-To: daveekstrom@yahoo.com
Date: 16 Oct 2014 21:19:05 -0700
Subject: Dave Ekstrom has sent you an eVite!
Content-Type: multipart/alternative;
boundary=--boundary_86_8204d11c-c020-4021-b1b4-cbcde3d91eef


----boundary_86_8204d11c-c020-4021-b1b4-cbcde3d91eef
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: base64

ICBEYXZlIEVrc3Ryb20gd2FudHMgdG8gaW52aXRlIHlvdSB0byBMYW5kbWFya3Mgb2Yg
UHJvcGhlY3khIA0KICAgDQogd3d3LmxhbmRtYXJrc29mcHJvcGhlY3kuY29tICA=
----boundary_86_8204d11c-c020-4021-b1b4-cbcde3d91eef
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: quoted-printable

<center><div style=3D"font-family: arial; font-size: 14px; line-h=
eight: 21px;">Dave Ekstrom wants to invite you to Landmarks of Pr=
ophecy!</div><br><a href=3D"http://www.landmarksofprophecy.com/ev=
ent-resources/evite-a-friend/cardtype/view/messageid/205106"><img=
src=3D"http://manna.myDomain.com.org/myDomain.com/website/landma=
rksofprophecy/images/lop-invite-unopened.jpg" border=3D"0"></a><b=
r><a href=3D"http://www.landmarksofprophecy.com/event-resources/e=
vite-a-friend/cardtype/view/messageid/205106" target=3D"_blank" s=
tyle=3D"font-family: arial; font-size: 11px;">www.landmarksofprop=
hecy.com</a></center>
----boundary_86_8204d11c-c020-4021-b1b4-cbcde3d91eef--
0
Comment
Question by:afacts
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5 Comments
 
LVL 76

Accepted Solution

by:
Alan Hardisty earned 1000 total points
ID: 40392578
That will never work because you are potentially trying to spoof the sender address, which is what spammers do and all the lovely Anti-Spam tools available such as SPF (Sender Policy Framework) and Anti-Spam software will sniff that out in seconds and prevent the emails.

You need to configure a genuine sending address from your domain / or use a 3rd party service to send the emails because it won't work with Exchange as your server isn't authorised to send emails on behalf of other domains.

Alan
0
 

Author Comment

by:afacts
ID: 40392625
interesting, as it does work some of the time.  We tested different emails, hotmail, gmail and yahoo, countermail, and some worked and some did not.
0
 
LVL 34

Assisted Solution

by:it_saige
it_saige earned 1000 total points
ID: 40392694
Hence the reason why it is a common (we could also use *best*) practice to have a donotreply email address that your mailers will come from.

Also make sure your own SPF (SenderID) records are valid and in place as well as your reverse DNS lookup for your external IP.  Some services (email hosts) will also be less likely to reject your messages if you sign them with a DKIM signature.

Unfortunately, Exchange does not support DKIM out of the box.  So if you wanted to implement DKIM Signing, your only recourse would be to:
1.  Use a smart host that will sign your messages.
2.  Use a third-party piece of software to sign your messages.
-or-
3.  Use a free-ware utility or build your own DKIM Signing Transport Agent (https://github.com/Pro/dkim-exchange is a good one that I used to write my own DKIM Signer with).

-saige-
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 40392743
It will work some of the time because not everyone implements SPF and therefore a receiving server that checks SPF for incoming emails and doesn't find a published SPF record for the sending domain will not fail the SPF check.

Other domains that do implement SPF will fail the check (unless their SPF record is extremely loose / incorrect) and thus there is no 100% guaranteed way to fix the problem when using a 'spoofed' sender as opposed to a genuine sender on your domain (or a noreply@ as suggested above).

Alan
0
 

Author Closing Comment

by:afacts
ID: 40393267
Thanks guys, we just changed the configuration to use an internal email address from our domain, and it seems to be working now.
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