From: Joel Gudknecht (photohausgmail.com)
Date: Wed Mar 01 2006 - 17:01:52 CST

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I've recently setup an access list with the following:

To:mydomain.com REJECT
To:validuser1mydomain.com OK
To:validuser2mydomain.com OK

etcetera, which has really helped in reducing the amount of DSN
reports I receive. (Thanks to Claus A_mann for the suggestion)

I'm still getting a couple here and there and I'm trying to figure out
how to prevent them as it concerns me a little.

Here is a sample:
------------------------
Your message did not reach some or all of the intended recipients.

      Subject: Returned mail: see transcript for details
      Sent: 2/28/2006 11:58 AM

The following recipient(s) could not be reached:

      hbennett_ypctc-mundo.net on 3/1/2006 4:46 PM
            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.
            < mfg.mydomain.com #5.1.1 SMTP; 550 RCPT
TO:<hbennett_ypctc-mundo.net> User unknown>
------------------------

I'm concerned that sendmail is even accepting these messages as they
have nothing to do with my domain and I don't know how to prevent this
behavior, any info on this subject would be appreciated, thank you.

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