[Imc-newsroom] Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host mx1.iriysoft.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

<ch at iriysoft.ru>: host mx1.iriysoft.ru[/var/imap/socket/lmtp] said: 550-Mailbox
    unknown.  Either there is no mailbox associated with this 550-name or you
    do not have authorization to see it. 550 5.1.1 User unknown (in reply to
    RCPT TO command)
-------------- next part --------------
Skipped content of type message/delivery-status-------------- next part --------------
An embedded message was scrubbed...
From: <imc-newsroom at ucimc.org>
Subject: íåáî ïðîòåêëî
Date: Thu, 12 Nov 2009 05:12:23 -0500
Size: 895
Url: http://lists.chambana.net/mailman/archive/imc-newsroom/attachments/20091112/eaea3e63/attachment.mht