Reverse Lookup .local or .com

Discussion in 'DNS Server' started by TheWall, Aug 20, 2009.

  1. TheWall

    TheWall Guest


    Where am i suppose to point the revers dns to?

    Domain.local or

    The error i get from mail msg's that fail:

    Diagnostic information for administrators:

    Generating server: Server.domain.local #550 5.7.1 Client host rejected: cannot find your hostname,
    [196.26.x.x] ##

    Original message headers:

    Received: from Server.domain.local ([fe80::a4dc:f918:c5e:5527]) by
    Server.domain.local ([fe80::a4dc:f918:c5e:5527%10]) with mapi; Thu, 20 Aug
    2009 11:20:22 +0200
    To: "''" <''>
    Date: Thu, 20 Aug 2009 11:20:22 +0200
    Subject: FW: test 21
    Thread-Topic: test 21
    Message-ID: <>
    Accept-Language: en-US, en-ZA
    Content-Language: en-US
    X-MS-Has-Attach: yes
    acceptlanguage: en-US, en-ZA
    Content-Type: multipart/related;
    MIME-Version: 1.0

    TheWall, Aug 20, 2009
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  2. Hello TheWall,

    The reverse lookup zone uses the ip range instead of the zone name. 196.26.x.x

    Best regards

    Meinolf Weber
    Meinolf Weber [MVP-DS], Aug 20, 2009
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  3. TheWall

    Chris Dent Guest

    In the context of mail delivery, you're supposed to point it to the
    valid public name used by your SMTP server.

    The SMTP Server should use a valid Public Name for outbound SMTP. e.g. Where this is set depends on the mail system, it looks
    like Exchange 2007, if that is the case it's set in the Properties for
    the Send Connector.

    The Public DNS Name for mail server, e.g., points to the
    public IP Address used by the mail server.

    The Public IP Address used by the mail server should have a PTR Record
    in a Reverse Lookup Zone pointing back to the public name.

    Chris Dent, Aug 20, 2009
  4. TheWall

    TheWall Guest

    Hi Meinolf, so what you are saying is that i must use .domain.local?

    In error:
    Received: from Server.domain.local
    TheWall, Aug 20, 2009
  5. TheWall

    Chris Dent Guest

    With regards to SMTP you *must* use the public name (.com). But you need
    to establish what that is, or make one up first.

    Chris Dent, Aug 20, 2009

  6. From the looks of it, the receiving mail server is doing a check for a
    reverse (PTR) entry for your MX record, and one doesn't exist.

    You will need to contact your ISP to create a reverse entry for your mail
    server. Internally, you will not have control of the external public IP,
    since it belongs to your ISP. Call them and ask them to create a PTR entry
    called (or whatever the public record is), and tell
    them you want the PTR associated with 196.26.x.x.

    I would also suggest to change the record that shows up in an SMTP telnet
    response. Currently it's showing as Server.domain.local, but you want it to
    show as, (or whatever it's called). In
    Exchange 2003, that's done in the ESM, under the Server object, Protocols,
    SMTP VS, right-click properties, Deliver Tab, Advanced. Type the name in

    If Exchange 2007, it's done in EMC, Server Config, Hub, Transport tab,
    Default, properties, as well as in Org, Hub, Transport, internet connector's
    properties that you created.


    This posting is provided "AS-IS" with no warranties or guarantees and
    confers no rights.

    Please reply back to the newsgroup or forum to benefit from collaboration
    among responding engineers, and to help others benefit from your resolution.

    Ace Fekay, MCT, MCTS Exchange, MCSE, MCSA 2003 & 2000, MCSA Messaging
    Microsoft Certified Trainer

    For urgent issues, please contact Microsoft PSS directly. Please check for regional support phone numbers.
    Ace Fekay [MCT], Aug 20, 2009
  7. TheWall

    TheWall Guest

    Hi, the PTR pointers are now pointing to

    Still got the error msg. It was done yesterday.

    I am on Exchange 2007. Cant find the Connector Connector properties under
    Server Config but the internet connectors under Organisation Config there are
    2 send connectors. The one i cant change. The source server for it is our old
    Exchange 2003 server. Can i delete that connector?

    The Send connector for the new server points to (Same
    as the ptr record)
    TheWall, Aug 21, 2009

  8. Sorry, I should have been more specific - under the Server Config section,
    click on Hub Transport, then properties of the Default connector.

    The source server is 2003? If you want the source to be your 2007, you'll
    want definitely want to change it to the 2007 server (the connector in the
    Org\Hub Transport\Send Connector, your default send connector properties,
    Source server.

    If you are still getting the message, it could have been from a message that
    was sent prior to you changing it. Remember, delivery sending warning is set
    at 4 hours, and the message expires in 2 days.


    Ace Fekay [MCT], Aug 21, 2009
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