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Message Rejected by "Postmaster@domain.com

A sender has received the following reply to an email (I have edited reciepiants, sender, and domain names
From: postmaster@domain.org
To: sender@yahoo.com
Date: Thu, 12 May 2005 10:32:52 -0500
Subject: Delivery Status Notification (Failure)

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.


We are using Exchange 2000.
Were can I find a record, or reason for the email being returned. The address & domain are correct

There is no users, or mailbox in Active Directory assigned to 'Postmaster"
1 Solution
"There is no users, or mailbox ... assigned to 'Postmaster'"

I dunno much about Exchange, but the relevant Internet RFCs (822, 2822)  *require*  that "postmaster@" be a valid address that reaches a human being responsible for the mail system.
Who is doing what here? Is there a sender at yahoo who sends a message to your domain ("domain.org") and gets this error message? If so, I think even Exchange puts "postmaster" as sender of the error message. And it means something is wrong with the address. As PsiCop says, someone should be assigned to receive *incoming* mail for postmaster@yourdomain.org
cookd47Author Commented:
The sender is a yahoo user, and I agree, someone should be assigned the postmaster
Apparantly this was not done when Exchange 2000 was installed. There is no Postmaster address assigned to Administrator. I find nothing in Notificatifications either.

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cookd47Author Commented:
Here is the result of another test message

Reporting-MTA: dns;hmeps4.domain.org
Received-From-MTA: dns;web81808.mail.mud.yahoo.com
Arrival-Date: Thu, 12 May 2005 12:42:59 -0500

Final-Recipient: rfc822;userr@domain.org
Action: failed
Status: 5.1.1

HMEPS4 is the Exchange 2000 Server
domain is the Windows 2000 domain.
I can send the same user a message with no problem

The status ID 5.1.1 means there is no mailbox for the recipient in the remote SMTP server.  I'm really confused with your question and the original posting.  

It looks like someone (sender@yahoo.com) is sending an email to user@domain.org in your domain (domain.org).  Your smtp server rejects that email because the there is no one with that mailbox and sends out a NDR (non-delivery report) using the generic postmaster@domain.org account to the sender (sender@yahoo.com) in yahoo.com.

If that's the case, the problem is on your end.  Dig through the SMTPSVC log files to see what happened.
cookd47Author Commented:
I think you understand the issue. I do not find any SMTPSVC log entries in the Event viewer.
Where are they located?
NOTE: the user@domain is a valid email address. This problem is only happening with one sender.
In Exchange 2003 logs can be found in
Not very human-readable stuff, but useful.

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