Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Tue, 23 Sep 2008 14:52:34 +0400 (MSD)

The original message was received at Tue, 23 Sep 2008 14:52:27 +0400 (MSD)
from [116.31.16.235]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.1.1 User unknown)
[email-masked]
    (reason: 550 5.1.1 User unknown)
    (expanded from: <[email-masked]>)

   ----- Transcript of session follows -----
550 5.1.1 [email-masked]... User unknown
550 5.1.1 <[email-masked]>... User unknown
... while talking to local:
>>> DATA
<<< 450 4.2.0 /var/mail/m_isure_3: Disc quota exceeded
m_isure_3... Deferred: 450 4.2.0 /var/mail/m_isure_3: Disc quota exceeded