Exchange 2010 not accepting emails from yahoo address

Hi there

Strange problem, our Exchange server appears to be rejecting emails from yahoo after they have been through our anti-spam provider.  This only seems to happen with yahoo address.  Even more strangely we have multiple accepts domains with many users having multiple aliases, I've sent a test email to myself from a yahoo account and it has delivered to one domain but not another.  I also included my gmail account which delivered no problem.

Failure notice as follows:


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

<user@domain.org>:
Remote host said: 550 Not accepted. [BODY]

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

Received: from [217.146.183.209] by nm21.bullet.mail.ukl.yahoo.com with NNFMP; 05 Dec 2011 17:03:16 -0000
Received: from [217.146.183.173] by tm2.bullet.mail.ukl.yahoo.com with NNFMP; 05 Dec 2011 17:03:16 -0000
Received: from [127.0.0.1] by omp1014.mail.ukl.yahoo.com with NNFMP; 05 Dec 2011 17:03:16 -0000
X-Yahoo-Newman-Property: ymail-3
X-Yahoo-Newman-Id: 8869.88747.bm@omp1014.mail.ukl.yahoo.com
Received: (qmail 18138 invoked by uid 60001); 5 Dec 2011 17:03:15 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1323104595; bh=rmj+TcPW/MYtQW9tXokSDaxYgmB2363WHRQS+MdvpfM=; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=RcnKcfGA2aEvhMM5XDqiatmtddhUzoyu6yqax1EbYy+TBpz8r0xpm3X+jlq4DlkHjn+Of4MvveDJKDq79w4jmBpCivkCKOAlM86rIzgl/cqIJVpz5dSJ+zEddfU/wv6LP6Ud+i01IlNvkoat6knk9pbCHm5J6B8g+e4CMYkYpMk=
DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.co.uk;
  h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding;
  b=xTMrUvtalwtrMICVdn0DYBK6a6ubHYw3o/LSiidmgpcUOPY/9WmHQ4vakvl/wxaVMC35lAJQjYFrr2jTD9maNNnhjjRP3YJB2If1ALLPaq9QB7+o6FfmybL4ZXt4OyJDiaaY6rjzSEa22HigHCnkQ1r9KfXrwUvcPP+ctA2vhd8=;
X-YMail-OSG: Wb8QwFEVM1kCPyIjwMxU0CEfWmYBrrWaC_RxAY2mlZjzXY9
LSl80u9iMprXA5MaN6wgs8A4maMGTBA2PPFSDT_YAaQeZbAvyy8KowlS_RH.
sVXJNP4kMzQxUNiUC8frj.YNN32L71ZWtyC30R5RXFkWwXzHXjCQWwb6q_lQ
nuGFOUdazKD9RUa9fuXTOw8h9P9BLVx.SffNrctGCpm5FWbcg71_J_HJxU0h
NDelhrWstX7Slekt265ZKIbtgG4DTAAP0rF36XxNlPukgyJ0QkyeIWi.mtlk
xs_yi0RJ9d7z5Ueq1WkaT7PzogbHyie50fASRB.NYa0973ia8HGxsCa8BbBz
9Wl.rTfrXDtVKZVZm3nT7MoPww.I4fOi.Xf411NN1z4sSjQ7NC5X2AqigL6x
COJ5cB1IEQu67k9B3qHsm31_nzMAvO1oF
Received: from [xxx.xxx.xxx.xx] by web28107.mail.ukl.yahoo.com via HTTP; Mon, 05 Dec 2011 17:03:15 GMT
X-Mailer: YahooMailWebService/0.8.115.325013
Message-ID: <1323104595.15046.YahooMailNeo@web28107.mail.ukl.yahoo.com>
Date: Mon, 5 Dec 2011 17:03:15 +0000 (GMT)
From: User <user@yahoo.co.uk>
Reply-To: User <user@yahoo.co.uk>
Subject: Test this one
To: "user@domain.org.uk" <user@domain.org.uk>,
  "user@domain.org" <user@domain.org>,
  "user@gmail.com" <user@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable


Any ideas?

Thanks!
JonDReesAsked:
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ITguy565Commented:
Please check your domain or your sending domain is not blacklisted.

You can use the following website to check this at

http://www.mxtoolbox.com/blacklists.aspx
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JonDReesAuthor Commented:
This is a problem receiving not sending.  I can happily send to yahoo just not receive!
0
ITguy565Commented:
Please diagnose the SMTP connection using SMTPDIAG:

http://www.msexchange.org/tutorials/SMTPDIAGdiagnose-Exchange-2003-SMTP-DNS.html

you can download the application from :

http://www.microsoft.com/download/en/details.aspx?id=11393


The command line syntex is smtpdiag "sendaccount@domain.com" "receiveaccount@domain.com" /Verbose

Also run this:
smtpdiag "receiveaccount@domain.com" "sendaccount@domain.com" /Verbose

Simulating traffic in both directions will give you the best idea of what is happening.

Please refer to my top link for examples






Please run this and post back with the results on why the message
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JonDReesAuthor Commented:
does this work for 2010 or is there an alternative?  only the downloads says requires 200 or 2003.
0
ITguy565Commented:
This also works for 2010 as all it does is diagnose an smtp connection.
0
JonDReesAuthor Commented:
Got the following:


C:\Program Files (x86)\SmtpDiag>SMTPDIAG "user@yahoo.co.uk" "user@domain.org" /v

Searching for Exchange external DNS settings.
Computer name is WOODFORD.
VSI 1 has the following external DNS servers:
There are no external DNS servers configured.

Checking SOA for domain.org.
Checking external DNS servers.
Checking internal DNS servers.

Checking TCP/UDP SOA serial number using DNS server [192.168.xxx.xx].
TCP test succeeded.
UDP test succeeded.
Serial number: 202

Checking TCP/UDP SOA serial number using DNS server [192.168.xx.xx].
TCP test succeeded.
UDP test succeeded.
Serial number: 202
SOA serial number match: Passed.

Checking local domain records.
Starting TCP and UDP DNS queries for the local domain. This test will try to
validate that DNS is set up correctly for inbound mail. This test can fail for
3 reasons.
    1) Local domain is not set up in DNS. Inbound mail cannot be routed to
local mailboxes.
    2) Firewall blocks TCP/UDP DNS queries. This will not affect inbound mail,
but will affect outbound mail.
    3) Internal DNS is unaware of external DNS settings. This is a valid
configuration for certain topologies.
Checking MX records using TCP: yahoo.co.uk.
  MX:    mx2.mail.eu.yahoo.com (10)
  MX:    mx1.mail.eu.yahoo.com (10)
  A:     mx2.mail.eu.yahoo.com [77.238.184.241]
  A:     mx1.mail.eu.yahoo.com [77.238.177.9]
Checking MX records using UDP: yahoo.co.uk.
  MX:    mx1.mail.eu.yahoo.com (10)
  MX:    mx2.mail.eu.yahoo.com (10)
  A:     mx1.mail.eu.yahoo.com [77.238.177.9]
  A:     mx2.mail.eu.yahoo.com [77.238.184.241]
Both TCP and UDP queries succeeded. Local DNS test passed.

Checking remote domain records.
Starting TCP and UDP DNS queries for the remote domain. This test will try to
validate that DNS is set up correctly for outbound mail. This test can fail for
3 reasons.
    1) Firewall blocks TCP/UDP queries which will block outbound mail. Windows
2000/NT Server requires TCP DNS queries. Windows Server 2003 will use UDP
queries first, then fall back to TCP queries.
    2) Internal DNS does not know how to query external domains. You must
either use an external DNS server or configure DNS server to query external
domains.
    3) Remote domain does not exist. Failure is expected.
Checking MX records using TCP: domain.org.
  MX:    webmail.domain.org.uk (10)
  A:     webmail.domain.org.uk [192.168.xxx.xx]
Checking MX records using UDP: domain.org.
  MX:    webmail.htb.org.uk (10)
Both TCP and UDP queries succeeded. Remote DNS test passed.

Checking MX servers listed for user@adomain.org.
Connecting to webmail.domain.org.uk [192.168.xxx.xx] on port 25.
Received:
220 WOODFORD.domain.org.uk Microsoft ESMTP MAIL Service ready at Tue, 6 Dec 2011 17
:04:13 +0000


Sent:
ehlo yahoo.co.uk

Received:
250-WOODFORD.domain.org.uk Hello [192.168.xxx.xx]
250-SIZE
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250-XRDST
250 XSHADOW


Sent:
mail from: <user@yahoo.co.uk>

Received:
250 2.1.0 Sender OK

Sent:
rcpt to: <user@domain.org>

Received:
250 2.1.5 Recipient OK

Sent:
quit

Received:
221 2.0.0 Service closing transmission channel

Successfully connected to webmail.xxx.org.uk.


It was also successful in the other direction.
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JonDReesAuthor Commented:
No solution provided
0
Marc BarashPresidentCommented:
Jon,
What was the status of this issue (if you remember)? I'm having the same weird issue - my users cannot receive email from select Yahoo accounts. This has not always been the case, they were happily receiving email from these Yahoo folks for quite some time until several weeks ago when it just "stopped". The Yahoo folks do not get an NDR or message of any kind, so as far as they're concerned, their emails are received. On our side (Exchange 2010/SBS 2011), we never receive the email.

So recently I've created my own test Yahoo account and surprisingly, my users are able to receive my test emails! This completely throws me for a loop. We do have an Untangle firewall w/ spam filtering in front of our Exchange server, so I've disabled the spam filter and no change. My users can receive my Yahoo tests, they still cannot receive the other folks.

We don't seem to be having this problem with other domains but the concern is this: if these Yahoo folks aren't getting NDRs, who's to say that other external domains aren't experiencing something similar - and we just don't know about it?

Anyone else out there, thoughts? ideas? Where do I look in the Exchange logs that perhaps I missed something obvious perhaps? I've tested with SMTPDiag in both directions and all tests are successful each time.
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