DOCUMENT:Q193924  06-AUG-2002  [exchange]
TITLE   :XFOR: Non-Delivery Report: Unknown Or Illegal User
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.0,5.5
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Exchange Server, versions 5.0, 5.5 
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SYMPTOMS
========

When sending a message to a Simple Mail Transfer Protocol (SMTP) address, users
and administrators of Microsoft Exchange may receive a non-delivery report (NDR)
similar to the following:

   From:   System Administrator
   Sent:   Wednesday, March 11, 1998 8:22 AM
   To:   Test User:Dekort, Ed
   Subject:   Undeliverable: Test Message

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

      Subject:   Test Message
      Sent:   03/11/1998 8:21 AM

   The following recipient(s) could not be reached:

      Testing UpJohn:Dekort, Ed on 03/11/1998 8:22 AM
      The recipient name is not recognized
      MSEXCH:IMC:SciCor:SciCorUS:HAWK 3553 553 5.1.1 unknown or illegal
      user: my.user.company.com

CAUSE
=====

The SMTP address declared is not a fully qualified SMTP address.

In the example used, the SMTP address, <my.user.company.com>, was probably
intended to read <my.user@company.com>.

Additional query words:

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Keywords          :  
Technology        : kbExchangeSearch kbExchange500 kbExchange550 kbZNotKeyword2
Version           : winnt:5.0,5.5
Issue type        : kbprb

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