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Sporadic NDR's on emails to one person.

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Sporadic NDR's on emails to one person. - 25.Aug.2008 7:15:17 PM

hmbtx

Posts: 34
Joined: 4.Feb.2005
From: Dallas
Status: offline

Has anyone witnessed these types of bounce backs? I'm receiving the bounce
back when I try to send an email to a specific client. As strange as it sounds it
usually gets bounced back when I use the auto complete feature in Outlook 2003.
When I delete the auto complete entry and then reenter the email address by hand
the email usually goes through to the recipient without a problem.

I have deleted the Outlook.NK2 file and I still have the problem.

I am running Windows 2003 Small Business Server with Exchange 2003.

Listed below is the NDR that I receive when the email does not go through
followed by the header information of that email. Please notice that the second line
of the email header information is �From: postmaster@mydomain.com�. This leads
me to believe that the email is getting bounced back from my Exchange 2003
server.

Any help will be greatly appreciated.

Thanks,

Howard

Your message did not reach some or all of the intended recipients.

     Subject:      FW: Maintenance renewal for CT Remote.
     Sent:           8/17/2008 3:52 PM

The following recipient(s) could not be reached:

     fsmith@theirdomain.com on 8/17/2008 3:52 PM
           There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
          <mydomain.com #5.5.0 smtp;554 <fsmith@theirdomain.com>: Relay access denied>

------------------------------------------- Email Header Information -------------------------------

Microsoft Mail Internet Headers Version 2.0
From: postmaster@mydomain.com
To: jdoe@mydomain.com
Date: Sun, 17 Aug 2008 15:52:26 -0500
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
           boundary="9B095B5ADSN=_01C90017BA021EDE00000027mydomain.com"
X-DSNContext: 7ce717b1 - 1194 - 00000002 - 00000000
Message-ID: <8wSA1XvpF00000001@mydomain.com>
Subject: Delivery Status Notification (Failure)

--9B095B5ADSN=_01C90017BA021EDE00000027mydomain.com
Content-Type: text/plain; charset=unicode-1-1-utf-7

--9B095B5ADSN=_01C90017BA021EDE00000027mydomain.com
Content-Type: message/delivery-status

--9B095B5ADSN=_01C90017BA021EDE00000027mydomain.com
Content-Type: message/rfc822

Subject: FW: Maintenance renewal for CT Remote.
Date: Sun, 17 Aug 2008 15:52:02 -0500
Message-ID: <2DFDA7FD4594D04880209A6A941BFA981FE89C@SERVER01.domain01.local>
MIME-Version: 1.0
Content-Type: multipart/alternative;
           boundary="----_=_NextPart_001_01C900AB.1DF6833E"
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Thread-Topic: Maintenance renewal for CT Remote.
Content-class: urn:content-classes:message
thread-index: AcjmhWC1zOCrIs+RSoyaUEP+/c2N+AaJVqZg
X-MimeOLE: Produced By Microsoft Exchange V6.5
From: "John Doe" <jdoe@mydomain.com>
To: <fsmith@theirdomain.com>

------_=_NextPart_001_01C900AB.1DF6833E
Content-Type: text/plain;
           charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

------_=_NextPart_001_01C900AB.1DF6833E
Content-Type: text/html;
           charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

------_=_NextPart_001_01C900AB.1DF6833E--

--9B095B5ADSN=_01C90017BA021EDE00000027mydomain.com�

Post #: 1

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RE: Sporadic NDR's on emails to one person. - 26.Aug.2008 1:25:55 PM

hmbtx

Posts: 34
Joined: 4.Feb.2005
From: Dallas
Status: offline

I am going to move this post to the message routing forum in hopes of getting a response there.

Howard

(in reply to hmbtx)

Post #: 2

RE: Sporadic NDR's on emails to one person. - 26.Aug.2008 2:37:14 PM

Sembee

Posts: 3494
Joined: 17.Jan.2008
From: Somewhere near London, UK
Status: offline

Your understanding of how Exchange (and SMTP servers in general) work with NDRs isn't quite correct.

The fact that your server is in the NDR does not mean it is your server with the problem.
All that means is the NDR was generated by that server.
The most effective way of dealing with errors is to reject them at the point of delivery, therefore forcing the sending server to generate the NDR.
Based on what you have posted, I would still suspect the problem is with the remote server, and it is rejecting the message at the point of delivery.
SMTP logging will show if there was a connection to the remote server or not.
Furthermore, if the problem is sporadic, then SMTP logging may also show you if it is connecting to the same server every time. What can sometimes happen with larger service providers is that they are using a cluster, and one of those cluster member's hasn't been updated correctly.

Simon.

_____________________________

Simon Butler,
Exchange MVP
Blog: http://www.sembee.co.uk/
Web: http://www.amset.info/
In the UK? Hire me: http://www.amset.co.uk/

(in reply to hmbtx)

Post #: 3

RE: Sporadic NDR's on emails to one person. - 26.Aug.2008 4:23:04 PM

hmbtx

Posts: 34
Joined: 4.Feb.2005
From: Dallas
Status: offline

Simon:

Thank you for your response.

When I perform an nslookup for their domain (see below) I notice that two of their mail servers are no longer active (30 and 40). Could this be the problem and if so, then why aren�t other people having the same problem that I am having?

The mail3 and mail2 addresses will resolve to an ip address. The backupmx1 and backupmx2 addresses can not be found (see below)

You are right. I don�t know exchange very well but I am all that I have to help resolve this issue.

I sincerely thank you for your help in this matter.

Howard

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

U:\>nslookup
Default Server: server01.domain01.local
Address: 10.1.1.100

> set type=mx
> theirdomain.com
Server: server01.domain01.local
Address: 10.1.1.100

Non-authoritative answer:
theirdomain.com   MX preference = 10, mail exchanger = mail3. theirdomain.com
theirdomain.com   MX preference = 20, mail exchanger = mail2. theirdomain.com
theirdomain.com   MX preference = 30, mail exchanger = backupmx1.veriomail.com
theirdomain.com   MX preference = 40, mail exchanger = backupmx2.veriomail.com

>U:\>ping mail3.theirdomain.com

Pinging mail3.theirdomain.com [x.x.x.x.] with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for x.x.x.x:
   Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

U:\>ping backupmx1.veriomail.com
Ping request could not find host backupmx1.veriomail.com. Please check the name
and try again.

U:\>

(in reply to Sembee)

Post #: 4

RE: Sporadic NDR's on emails to one person. - 26.Aug.2008 5:41:35 PM

Sembee

Posts: 3494
Joined: 17.Jan.2008
From: Somewhere near London, UK
Status: offline

If the server doesn't respond then you would get a different error. Relay denied errors need a valid connection to the server. Therefore the errors you have seen are not related to the servers not responding.

Simon.

_____________________________

Simon Butler,
Exchange MVP
Blog: http://www.sembee.co.uk/
Web: http://www.amset.info/
In the UK? Hire me: http://www.amset.co.uk/

(in reply to hmbtx)

Post #: 5

RE: Sporadic NDR's on emails to one person. - 26.Aug.2008 5:49:25 PM

hmbtx

Posts: 34
Joined: 4.Feb.2005
From: Dallas
Status: offline

Simon:

Thank you for the information.

I assume that the only way to determine where the problem is is to set up logging.
This is something that I have not done before so I will have to read up on the subject.

Howard

(in reply to Sembee)

Post #: 6