Do not use on any
shared computer
September 7, 2008 10:00pm pdt
 
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Attachment Details

Invalid Domain NDR for a valid domain

Tags: Microsoft, Exchange, 2003, The message could not be delivered because the recipient's destination email system is unknown or invalid.
Currently we have a user that is trying to send mail with attachments (V. Small) to various email addresses. These email addresses have been confirmed as valid, as we can send to them ourselves. The user in question can send attachments to us, it seems to be completely random. Once an address starts sending NDRs, then the user can never send to that email again when an attachment is included. Up until today, this was limited to one user, but it seems to be spreading.

All users log on via Windows Server 2003 Standard w/ Terminal Services. They use Outlook 2003 via Exchange.

The user receives the following bounceback:
Your message did not reach some or all of the intended recipients.

      Subject:             [Subject]
      Sent:                 08/05/2008 10:09

The following recipient(s) could not be reached:

      'name.surname@domain.co.uk' on 08/05/2008 10:09
            The message could not be delivered because the recipient's destination email system is unknown or invalid. Please check the address and try again, or contact your system administrator to verify connectivity to the email system of the recipient.
            <userdomain.co.uk #5.1.2>

We've done a complete user recreation (including mailbox purge), however, we had to export a PST and re-import it as we needed to keep the emails.
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Question Stats
Zone: Software
Question Asked By: synergiq
Solution Provided By: montezz
Participating Experts: 1
Solution Grade: A
Views: 8
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Accepted Solution by montezz:

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[+][-]Author Comment by synergiq
Author Comment by synergiq:

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