Solved

mail bounce back 550-No Such User Here

Posted on 2014-04-29
12
7,014 Views
Last Modified: 2014-05-01
Hi all.

I have a mail problem.
Please can someone help me.

The problem only occurs when sending mail from mail boxes on amethysthomes.co.uk to 2 other domains: shorcoelectrical.co.uk and absolutecivilengineering.co.uk
When sending from other mail like gmail it works correctly.


When either of them send mail to each other they get a bounce back. e.g:
example@amethysthomes.co.uk sends to example@shorcoelectrical.co.uk
or
example@shorcoelectrical.co.uk sends to example@amethysthomes.co.uk


I have tested by emailing someone@shorcoelectrical.co.uk from my gmail and he replied back (so I know the email is correctly spelled).
I have logged into the online outlook web app for example@amethysthomes.co.uk, wrote a new email and pasted exactly the correct email address in the send to but it still doesn't work (so i know its not a client side program setting problem. like outlook SMTP settings).


I will now paste two bounce backs below...

This is the bounce back when sending from example@amethysthomes.co.uk to example@shorcoelectrical.co.uk

Delivery has failed to these recipients or groups:
example@shorcoelectrical.co.uk
A problem occurred during the delivery of this message to this e-mail address. Try sending this message again. If the problem continues, please contact your helpdesk.
The following organisation rejected your message: shorcoelectrical.co.uk.


Diagnostic information for administrators:
Generating server: exch-2010-smtp-out-04.livemail.co.uk
example@shorcoelectrical.co.uk
shorcoelectrical.co.uk #<shorcoelectrical.co.uk #5.0.0 smtp; 550-Verification failed for <example@amethysthomes.co.uk> 550-No Such User Here 550 Sender verify failed> #SMTP#
Original message headers:
Received: by exch-2010-smtp-out-04.livemail.co.uk (Postfix, from userid 500)
id 0A9775B86D6; Mon, 28 Apr 2014 14:16:38 +0100 (BST)
X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on
exch-2010-smtp-out-04.livemail.co.uk
X-Spam-Level:
X-Spam-Status: No, score=0.0 required=7.0 tests=HTML_MESSAGE,RDNS_DYNAMIC
autolearn=disabled version=3.2.5
Received: from exch3-ht01.email3.local (mail213-171-216-80.livemail.co.uk
[213.171.216.80]) by exch-2010-smtp-out-04.livemail.co.uk (Postfix) with
ESMTP id E7E7E5B8670 for <example@shorcoelectrical.co.uk>; Mon, 28 Apr
2014 14:16:37 +0100 (BST)
Received: from EXCH3-MBX02.email3.local ([fe80::a1de:d244:9f13:c12f]) by
exch3-ht01.email3.local ([fe80::185d:c10b:1508:aa4c%17]) with mapi id
14.02.0247.003; Mon, 28 Apr 2014 14:16:37 +0100
From: Jamie Kettle <example@amethysthomes.co.uk>
To: "example@shorcoelectrical.co.uk"
<example@shorcoelectrical.co.uk>
Subject: testing mail
Thread-Topic: testing mail
Thread-Index: Ac9i5BWCrDaGRhfCT++9WAvVFfyGug==
Date: Mon, 28 Apr 2014 13:16:37 +0000
Message-ID: <9CF72264226DCF4D8E0D097EA6636FF5496829@exch3-mbx02.email3.local>
Accept-Language: en-GB, en-US
Content-Language: en-GB
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [109.154.165.231]
Content-Type: multipart/alternative;
boundary="_000_9CF72264226DCF4D8E0D097EA6636FF5496829exch3mbx02email3l_"
MIME-Version: 1.0

Open in new window


This is the bounce back when sending from example@shorcoelectrical.co.uk to example@amethysthomes.co.uk (the other way around this time)

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

example@amethysthomes.co.uk
No Such User Here

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

Return-path: <example@shorcoelectrical.co.uk>
Received: from [85.189.117.164] (port=51842 helo=tonyspc)
by scenic.websitewelcome.com with esmtp (Exim 4.82)
(envelope-from <example@shorcoelectrical.co.uk>)
id 1WehRO-0001eJ-Ak
for example@amethysthomes.co.uk; Mon, 28 Apr 2014 04:01:34
-0500
From: "example name" <example@shorcoelectrical.co.uk>
To: <example@amethysthomes.co.uk>
Subject: Test
Date: Mon, 28 Apr 2014 10:01:34 +0100
Message-ID:
<!&!AAAAAAAAAAAYAAAAAAAAAEYceq5lKCRNnQ87B1erxQfCgAAAEAAAAOzNvLbE50RMqZaWizdN
CDMBAAAAAA==@shorcoelectrical.co.uk>
MIME-Version: 1.0
Content-Type: multipart/related;
boundary="----=_NextPart_000_012E_01CF62C8.D67C10F0"
X-Mailer: Microsoft Outlook 14.0
Thread-Index: Ac9iwHQoRLbSEqdERpS62c5uAOHhlA==
Content-Language: en-gb
Disposition-Notification-To: "example name"
<example@shorcoelectrical.co.uk>

This is a multipart message in MIME format.

------=_NextPart_000_012E_01CF62C8.D67C10F0
Content-Type: multipart/alternative;
boundary="----=_NextPart_001_012F_01CF62C8.D67C10F0"


------=_NextPart_001_012F_01CF62C8.D67C10F0
Content-Type: text/plain;
charset="US-ASCII"
Content-Transfer-Encoding: 7bit

Test



Kind Regards

E: example@shorcoelectrical.co.uk

W: www.shorcoelectrical.co.uk <http://www.shorcoelectrical.co.uk/>;; 






------=_NextPart_001_012F_01CF62C8.D67C10F0
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style=3D'font-size:12.0pt;mso-fareast-language:EN-GB'> Kind =
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style=3D'font-size:12.0pt;mso-fareast-language:EN-GB'><o:p> </o:p></=
span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:12.0pt;mso-fareast-language:EN-GB'>Peter =
Turnbull<o:p></o:p></span></b></p><p class=3DMsoNormal><b><span =
style=3D'font-size:12.0pt;mso-fareast-language:EN-GB'>Contracts =
Manager<o:p></o:p></span></b></p><p class=3DMsoNormal><span =
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Question by:helpchrisplz
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Expert Comment

by:Davis McCarn
ID: 40031770
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by:helpchrisplz
ID: 40031787
I read that before posting here. Not really sure what I can do from that article.

Mx toolbox says the reverse dns is ok for amethysthomes http://mxtoolbox.com/SuperTool.aspx?action=smtp%3aamethysthomes.co.uk&run=toolpage
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by:Simon Butler (Sembee)
ID: 40032382
Both of those domains are hosted by the same outfit - something called websitewelcome.com. Looks like it is Hostgator's reseller account DNS servers, they probably don't even know their email is in the USA!

It looks like they are using a call back method of anti spam protection, which is where the server you are sending to attempts to make a connection back to your server to verify the sender exists.

It was a flawed approach from the start and very unreliable and I think only EXIM still does it. I know that 123-reg.co.uk tried to implement it at one point and dropped it very quickly due to complaints.
You can read about it here:
http://www.exim.org/exim-html-3.20/doc/html/spec_45.html

Not a lot you can do about it unfortunately. As this is a reseller system their "host" (who isn't really their host) will have no control over the configuration at all.
You could try enabling recipient filtering so that the correct results go back, but Exchange will use a tar pit so that may not provide the result you are looking for.
You could also try routing email via a smart host (your ISP for example). Ultimately changing mail servers for them is going to be the only option.

Simon.
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by:helpchrisplz
ID: 40032712
Thanks for your replies.

Please can you tell me in a very easy to understand way, why the problem is only occuring when sending from emails on the amethysthomes domain and not from other email services like gmail.

i have been asked why this is and i cant put together a response from what i have learnt so far from the answers to this question.

Thanks.
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by:Simon Butler (Sembee)
ID: 40032796
It is because of the way Exchange reacts to the call back.
Gmail isn't Exchange, it is a completely different SMTP server stack that can obviously cope or the server has been configured to accept email from the major providers. There can be any number of reasons why email from a major provider will work - as the email server configuration cannot be seen you have no way of knowing.

Simon.
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Expert Comment

by:Davis McCarn
ID: 40032849
The error is from the sending side and means that the server does not think the account exists.  Go raise Cain with your webhost and make them fix it!
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Author Comment

by:helpchrisplz
ID: 40032931
@DavisMcCarn
sending side as in amethysthomes?

The company i work for hosts the amethyst homes website and we have control over the DNS from our plesk panel.

The mail is then sent to an external mail server so i have set the DNS to talk to the external mail server.

i have opened a ticket with the email hosting provider (sending them the same 2 bounce backs as the question here.)

This is how they have responded so far:

We have escalated the case to our Engineers and found out that the issue lies with the server of the shorcoelectrical.co.uk  domain name. If they are using an Outlook software to send out messages, they might want clear the autocomplete cache.
 
http://www.wikihow.com/Clear-the-Outlook-Autocomplete-Cache


This is reason why they have to contact as well the mail server provider and ask about the meaning of the bounce back message. They can check with the mails server if your domain/ mailbox was somehow blocked by their server.

That reverse dns is only a warning but not really affecting it. On the other hand, upon checking on the bounce back error message, the issue actually lies on the other provider where example@shorcoelectrical.co.uk is hosted. The email provider to where example@shorcoelectrical.co.uk  is not permitting Fasthosts to send emails to them specifically in their server and as per checked on this link http://geniustechblog.com/sender-verification/. Please be advised to add your email address as a whitelist email address in the recipient's inbox and should test it again.
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Expert Comment

by:Davis McCarn
ID: 40033069
"example@amethysthomes.co.uk
No Such User Here"

The 550 error means that the SENDING server could not authenticate the sender and refused to send the message.  When it never gets sent, you can't blame the recipient, can you?
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Author Comment

by:helpchrisplz
ID: 40033122
ok so anyone know a way of fixing it or diagnosing what to change?


could any of this be a problem?
http://mxtoolbox.com/domain/amethysthomes.co.uk/?source=findmonitors

or the DNS:

        88.208.248.91 / 24      PTR      amethysthomes.co.uk.
      amethysthomes.co.uk.      NS      ns.amethysthomes.co.uk.
      amethysthomes.co.uk.      A      88.208.248.91
      amethysthomes.co.uk.      MX (10)      mail.livemail.co.uk.
      amethysthomes.co.uk.      TXT      v=spf1 +a +mx ~all
      ftp.amethysthomes.co.uk.      CNAME      amethysthomes.co.uk.
      ipv4.amethysthomes.co.uk.      A      88.208.248.91
      mail.amethysthomes.co.uk.      A      213.171.216.114
      ns.amethysthomes.co.uk.      A      88.208.248.91
      smtp.amethysthomes.co.uk.      A      213.171.216.50
      webmail.amethysthomes.co.uk.      A      88.208.248.91
      www.amethysthomes.co.uk.      CNAME      amethysthomes.co.uk.
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Accepted Solution

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Simon Butler (Sembee) earned 500 total points
ID: 40034116
I have to disagree with the above post by "DavisMcCarn". This has nothing to do with the sending server.
The remove server is rejecting the message with "No such user here". However it is the additional text that is key

"550-Verification failed for <example@amethysthomes.co.uk>"

The remote server is rejecting the email from your server and returning no such user here as a reject message. As written by the support technician above, the receiver needs to white list the domains. I didn't realise this was a hosted Exchange platform - that means your hands are tied completely, there is nothing you can do. You can make all of the DNS changes that you like, but this is NOT a DNS issue.

You cannot route the email another way, because it isn't your server to change the routing. Both sides will say they can receive email correctly from everyone else, so you are basically stuck. You will need to use another method to communicate with those two domains. As I pointed out above, you should also advise them that their email is stored on a US server so is subject to US laws.

Simon.
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Expert Comment

by:Davis McCarn
ID: 40034332
Simon, I stand corrected.
And, I beieve it was stated that both companies are hosted by the same hosting company.  If true, you need to scream at them to fix it.
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Author Closing Comment

by:helpchrisplz
ID: 40035346
thx
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