Announcement

Collapse
No announcement yet.

Unable to send emails to one external domain only

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Unable to send emails to one external domain only

    My users are getting NDRs from our exchange server when they try to send to one external domain only. They can send to all other domains, internal/external, just fine.

    NDR looks like this:

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

    Subject: Test
    Sent: 1/5/2010 9:34 AM

    The following recipient(s) could not be reached:

    '[email protected]' on 1/5/2010 9:34 AM
    The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
    <server.InternalDomainDNSName.ch #5.1.1>



    Enabled diagnostics logging this event appears when NDR is generated:

    Event Type: Information
    Event Source: MSExchangeTransport
    Event Category: Categorizer
    Event ID: 6015
    Date: 1/5/2010
    Time: 9:34 AM
    User: N/A
    Computer: SERVER
    Description:
    Categorizer is NDRing a recipient with address SMTP:[email protected] with reason code 0x80070002 (The system cannot find the file specified.
    ).

    For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
    Data:
    0000: 02 00 00 00 ....


    Also mail doesn't appear in SMTP Logs.

    Any help would be much appreciated.
    Thanks!

  • #2
    Re: Unable to send emails to one external domain only

    The NDR that you have pasted means what it says - the user does not exist at the server the email was delivered to. The usual cause of that is the server is trying to deliver to the wrong server, or where a cluster was involved (at the other end). If the domain is hosted by a large ISP they will have multiple servers accepting email.

    However if you see nothing in the SMTP logs and have logging set to the appropriate level, that could mean Exchange thinks the domain is internal. Has there every been a connection with this remote domain that you haven't posted?
    Does the domain exist listed on an SMTP connector for example? On a contact or in the recipient policy?

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
    Exchange Resources List: http://exbpa.com/
    In the UK? Hire me: http://www.sembee.co.uk/

    Sembee is a registered trademark, used here with permission.

    Comment


    • #3
      Re: Unable to send emails to one external domain only

      The mail address exists, error appears not only when sending to one mail address but to all mail addresses of one domain. Mail addresses are written correctly.

      For SMTP logs are set to log all the fields.

      I also believe that somehow Exchange thinks the domain is internal, despite the fact that DNS records for this external domain show nothing wrong.

      From my information, there were contacts created long time ago for users in this external domain but then the contact were replaced with mailbox enabled users. Contacts were deleted.

      Checked and the domain is not listed on an SMTP connector or on a contact or in the recipient policy.

      Comment


      • #4
        Re: Unable to send emails to one external domain only

        Has this domain ever been part of your Exchange org? Exchange only treats it has internal if the domain has been added to recipient policy, nothing else.

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

        Comment


        • #5
          Re: Unable to send emails to one external domain only

          No, the domain has not been a part of the Exchange org...

          Comment


          • #6
            Re: Unable to send emails to one external domain only

            Problem solved !!!
            After ages of research I found what was the problem...Metabase in IIS...

            Used Metabase Explorer, expand the LM metabase, expand SMTPSVC, expand virtual SMTP server, expand, Domain which are the internal routing domains. This is what tells the categorizer to bypass and go striaght to local delivery.
            Well here was a key with that External Domain...
            Deleted it and it looks ok now...mails are being routed to the smart hosts.


            /closed

            Comment

            Working...
            X