Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Wed, 08 Oct 2008 10:01:30 -0700

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email-masked]
    (generated from [email-masked])
    SMTP error from remote mail server after end of data:
    host mxs.mail.ru [194.67.23.20]: 550 Message was not accepted -- invalid mailbox.  Local mailbox [email-masked] is unavailable:
    user not found

------ This is a copy of the message's headers. ------

Date:	Wed, 8 Oct 2008 12:01:25 -0500
From:	=?koi8-r?B?78LV3sXOycU=?= <[email-masked]>
Reply-To: [email-masked]
To: [email-masked]
Subject: =?koi8-r?B?UmU6IPfB28Ug1d7B09TJxSDQz8TU18XS1sTBxdTT0S4=?=