[Apakabar] {Spam? 4.39} Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host mx77.ipn.ru.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<sta at ipn.ru>: host 213.24.194.65[213.24.194.65] said: 550 <sta at ipn.ru>:
    Recipient address rejected: User unknown in virtual mailbox table (in reply
    to RCPT TO command)
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From: =?koi8-r?B?9fPuINcgMjAxMC0yMDExIMc=?=<apakabar at polarhome.com>
Subject: =?koi8-r?B?687Jx8EgxM/Iz8TP1yDJINLB08jPxM/X?=
Date: Tue, 15 Jun 2010 14:43:09 +0100
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URL: <http://www.polarhome.com/pipermail/apakabar/attachments/20100615/c0a37765/attachment-0001.mail>