Subject: Delivery Notification: Delivery has failed

From: Internet Mail Delivery <[email-masked]>
Date: Wed, 24 Sep 2008 09:22:40 -0700 (PDT)

This report relates to a message you sent with the following header fields:

  Message-id: <01c91ea4$ce37c100$d8df8dd3@rserpool-archive>
  Date: Thu, 25 Sep 2008 00:22:34 +0800
  From: =?koi8-r?B?78vTwc7B?= <[email-masked]>
  To: [email-masked]
  Subject: <<SPAM?>> =?koi8-r?B?7c/UydfBw8nRIM/U18XU09TXxc7Oz9PUyQ==?=

Your message cannot be delivered to the following recipients:

  Recipient address: [email-masked]
  Reason: Remote SMTP server has rejected address
  Diagnostic code: smtp;550 5.1.1 <[email-masked]>... User unknown
  Remote system: dns;skat.usc.edu (TCP|128.125.137.211|41849|128.125.253.131|25) (skat.usc.edu ESMTP Sendmail 8.13.8+Sun/8.13.8/usc; Wed, 24 Sep 2008 09:22:39 -0700 [PDT])