Subject: Warning: could not send message for past 4 hours

From: Mail Delivery Subsystem <[email-masked]>
Date: Tue, 23 Sep 2008 18:52:50 +0400 (MSD)

**********************************************
    **      THIS IS A WARNING MESSAGE ONLY      **
    **  YOU DO NOT NEED TO RESEND YOUR MESSAGE  **
    **********************************************

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

   ----- Transcript of session follows -----
>>> 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
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old