[Tulungan] Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host mails.radnet.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

<mail.pochta.ruaidsaidsm at radnet.ru>: host 62.183.95.82[62.183.95.82] said: 550
    5.1.1 <mail.pochta.ruaidsaidsm at radnet.ru>: Recipient address rejected: User
    unknown in virtual mailbox table (in reply to RCPT TO command)
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From: =?koi8-r?B?4cbJ28Eg7c/Ty9fZ?= <tulungan at polarhome.com>
Subject: =?koi8-r?B?4snMxdTZIM7BIPPQxcvUwcvMyQ==?=
Date: Wed, 09 Jul 2008 09:38:50 +0000
Size: 4700
Url: http://www.polarhome.com/pipermail/tulungan/attachments/20080709/40b8f39e/attachment-0001.mht