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Exchange 2003: Administrator account has thousands of Undeliverables per day.

Posted on 2004-10-05
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Last Modified: 2008-02-26
Each morning when I check my Administrators email, I find thousands of emails where exchange is trying to send out an unknown user reply to an invalid email account.  I've also noticed the most of this incoming spam is addressed to my domain with just any name before the @ symbol.  Is there a way to prevent these undeliverable error messages from stacking up in my administrators mail box.

I have unchecked the allow non-delivery reports box but I am still getting these messages in droges.  

I am using norton enterprise edition, maybe there is something in there that could help?

Please advise.

Thanks

P.S. this is what I am getting:

From: System Administrator
To: Administrator

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

      Subject:      Lenders are waiting.
      Sent:      10/5/2004 8:29 AM

The following recipient(s) could not be reached:

      thornton@mydomain.com on 10/5/2004 8:36 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.
            <mydomain.com #5.1.1>
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Question by:uxo22
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Sembee earned 300 total points
ID: 12228627
Exchange 2003 introduced a new facility to filter email messages if the email address doesn't exist in the Active Directory. This will stop spammers from sending messages to non-valid addresses. The rejection is done at the SMTP level - so the email message isn't even delivered. If valid senders misspell an email address then they will get a bounce message immediately - indicating that the message has been rejected.

To enable this option:

1. Expand ESM, Message Delivery.
2. Right click on "Message Delivery" and choose Properties.
3. Click on the tab "Recipient Filtering".
4. Enable the option "Filter Recipients who are not in the directory."

You then need to enable the Recipient Filter on the SMTP Server.

1. Still in ESM, Expand Admin Groups, <your admin groups>, Server, <your server>, Protocols, SMTP.
2. Right click on SMTP Virtual Server and choose Properties.
3. Click on "Advanced" next to the IP address on the first tab.
4. With the IP address selected, choose "Edit".
5. Enable "Apply Recipient Filter".
6. Click Apply/OK until clear.

Simon.
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