NDR Language in Exchange 2007

Posted on 2008-11-13
Last Modified: 2012-05-05
I have some troubles with NDR's in Exchange 2007 sp1.
What is it that sets the language?

My production environment:
2 CA+HT servers
3-node scc-cluster with 2 MBX-servers.
All is Exchange 2007 sp1 installed on windows server 2003 SP2.

My test environment
1 single Exchange 2007 ca+ht+mbx. Installed on windows 2003 R2.

I've set the following attributes (which i thought would solve my problem) in all HT-servers
ExternalDsnDefaultLanguage              : en-US
ExternalDsnLanguageDetectionEnabled     : False
InternalDsnDefaultLanguage              : en-US
InternalDsnLanguageDetectionEnabled     : False

It started with a german customer to us that resolved a NDR in swedish (everything resides in sweden, regional settings are set to swedish on all servers).

Then I started making some tests and here are the results.
n-e-a means non-existing address.
n-e-d means non-existing domain. is my external production domain. test.lan is of course my testenvironment.
Mails are routed between test and production with dedicated send connectors.

If I send emails from my production-exchange to I get an NDR in English
If I send emails from my production-exchange to I get a swedish NDR (could be my spamfilter)
If I send emails from my production-exchange to n-e-a@test.lan i get a swedish NDR (does not pass spamfilter)

If I send emails from my test-exchange to n-e-a@test.lan I get a NDR in English.
If I send emails from my test-exchange to I get a NDR in English. (I have to manually remove this from exchange que with 'remove with ndr' since i got no internet send connector in my test-exchange)
If I send emails from my test-exchange to I get a NDR in swedish.

If I send an email from my other company (I'm a consultant) to I get a NDR in swedish.
If I send an email from my g-mail to I get a NDR in English.

Why does NDR in swedish exists?
How can I manually set this to always be in English?

I'm stuck and all help is appreciated.
Question by:nncg
    LVL 12

    Expert Comment

    LVL 12

    Expert Comment

    the third is about setting it to english

    Author Comment

    I've read those articles and they refere to the setting InternalDsnDefaultLanguage.
    And as I described earlier this setting is already set.

    Just to test I've created a postmaster mailbox in my testenvironment and set the language to english.
    No luck...  still in swedish. I've attached a header sent from my production to my test environment to a nonexistingaddress and I get a NDR in swedish.

    Received: from ( by
     Testad1-vs-exch.test.lan ( with Microsoft SMTP Server (TLS)
     id; Fri, 14 Nov 2008 09:59:38 +0100
    Received: from ([]) by
 ([]) with mapi; Fri, 14 Nov 2008
     09:59:37 +0100
    From: "lastname, firstname" <>
    To: "'madfjasd@test.lan'" <madfjasd@test.lan>
    Date: Fri, 14 Nov 2008 09:59:37 +0100
    Subject: test
    Thread-Topic: test
    Thread-Index: AclGN1H6Z9A4CoHVT9KtjlxceMFShw==
    Message-ID: <>
    Accept-Language: sv-SE
    Content-Language: en-US
    acceptlanguage: sv-SE
    Content-Type: multipart/alternative;
    MIME-Version: 1.0

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