Undelivered Mail Returned to Sender

[MAILER-DAEMON@xxxxxxxxxxxx (Mail Delivery System)]

This is the Postfix program at host mail.vniiftri.org.

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 Postfix program

<edward.aslanyan@xxxxxxxxxxx>: data format error. Command output:
    edward.aslanyan: Mailbox does not exist

Reporting-MTA: dns; mail.vniiftri.org
X-Postfix-Queue-ID: 934E5E64176
X-Postfix-Sender: rfc822; kernprof@oss.sgi.com
Arrival-Date: Sun, 20 Apr 2008 11:05:20 +0400 (MSD)

Final-Recipient: rfc822; edward.aslanyan@vniiftri.ru
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; data format error. Command output: edward.aslanyan:
    Mailbox does not exist
> --- Begin Message ---
>
> --- End Message ---