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Q193924: XFOR: Non-Delivery Report: Unknown Or Illegal User

Article: Q193924
Product(s): Microsoft Exchange
Version(s): winnt:5.0,5.5
Operating System(s): 
Keyword(s): 
Last Modified: 06-AUG-2002

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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:

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

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