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Dns problem with only one domain

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  • Dns problem with only one domain


    I have an exchange server 2007 with windows server 2003.
    We can send mail to any domains except one.

    I search for the web different solutions but i cant resolv my problem.

    The domain is ok with a nslookup.
    I acces with a telnet and the domain respond ok.
    I change the exchange configuration for use external dns lookups.

    The mail are in queu with 451 4.4.0 DNS query failed.

    From other domains gmail etc... i can send mails ok and i can receive from this domain.

    Any idea???

    Thanks in advanced ,

    great work.

  • #2
    Re: Dns problem with only one domain

    What NDRs are you getting from this domain? Really need to know that first.
    BSc, MCSA: Server 2008, MCSE, MCSA: Messaging, MCTS
    Cruachan's Blog


    • #3
      Re: Dns problem with only one domain

      Hello Cruachan,

      Thanks for your answer but whats NDRs?


      • #4
        Re: Dns problem with only one domain

        I would agree with Cruchan we need to check the NDR, which means the non delivery report or delivery failure message which you get when email delivery fails....

        Pledge Technologies
        Best Regards,
        Pledge Technologies


        • #5
          Re: Dns problem with only one domain

          Did you restart the Hub Transport service once you made the change from smarthost to DNS?

          Also have you checked the queued emails for typo's?


          • #6
            Re: Dns problem with only one domain


            Thanks for your answers , this de NDR:

            Información de diagnóstico para los administradores:
            Generando servidor: LOQUESEA.INFO
            [email protected]
            #550 4.4.7 QUEUE.Expired; message expired ##
            Encabezados de mensajes originales:
            Received: from email.LOQUESEA.INFO ([]) by email.LOQUESEA.INFO
            ([]) with mapi; Fri, 8 Jan 2010 10:24:30 +0000
            From: user <[email protected]>
            To: "[email protected]" <[email protected]>
            Date: Fri, 8 Jan 2010 10:24:23 +0000
            Subject: pruebas
            Thread-Topic: pruebas
            Thread-Index: AQHKkEzCgC18xLlirUmR6SXWo+uJJQ==
            Message-ID: <[email protected] LOQUESEA.INFO>
            Accept-Language: es-ES, en-US
            Content-Language: es-ES
            acceptlanguage: es-ES, en-US
            Content-Type: text/plain; charset="us-ascii"
            Content-Transfer-Encoding: quoted-printable
            MIME-Version: 1.0

            This the queue:

            [PS] C:\Documents and Settings\Administrator>get-queue -SortOrder:-MessageCount
            -Results:1 | fl

            Identity : email\32475
            DeliveryType : DnsConnectorDelivery
            NextHopDomain :
            NextHopConnector : 3da69a1e-0c10-4edd-8833-7638e8f3c23a
            Status : Retry
            MessageCount : 3
            LastError : 451 4.4.0 DNS query failed
            LastRetryTime : 12/01/2010 9:32:20
            NextRetryTime : 12/01/2010 9:43:26
            IsValid : True
            ObjectState : Unchanged
            Last edited by darkwood; 12th January 2010, 10:48.