Что значит это сообщение?

Мне кажется что моё сообщение не отправилось(это пришло в ответ)
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

s.nikiforov@rr.ru
SMTP error from remote mailer after MAIL FROM:<kosy06@bk.ru> SIZE=29050296:
host mailgate.rr.ru [213.243.85.169]: 552 5.2.3 Message size exceeds fixed maximum message size (20971520)

------This is a copy of the message, including all the headers. ------
------The body of the message is 28676035 characters long; only the first
------1024 or so are included here.

Return-path: <kosy06@bk.ru>
Received: from mail by f281.mail.ru with local
id 1Nd8dN-0003Np-00
for s.nikiforov@rr.ru; Thu, 04 Feb 2010 23:49:05 +0300
Received: from [79.165.21.11] by win.mail.ru with HTTP;
Thu, 04 Feb 2010 23:49:05 +0300
From: =?koi8-r?Q?=E1=CE=C4=D2=C5=CA?= <kosy06@bk.ru>
To: s.nikiforov@rr.ru
Subject: =?koi8-r?Q?=F3=C5=D2=C7=C5=C0_=EE=C9=CB=C9=C6=CF=D2=CF=D7=D5_=F4=D2=C5=CB=C9_=C4=CC=D1_DFM_=CD=C1=CC=CF=C9=DA=D7=C5=D3=D4=CE=D9=C5.?=
Mime-Version: 1.0
X-Mailer: mPOP Web-Mail 2.19
X-Originating-IP: [79.165.21.11]
Date: Thu, 04 Feb 2010 23:49:05 +0300
X-Mru-Data: 1231:1:1:70:70:0
Reply-To: =?koi8-r?Q?=E1=CE=C4=D2=C5=CA?= <kosy06@bk.ru>
X-Files-Id: 7J86J5
Content-Type: multipart/mixed;
boundary="----oW5rFX7d-TRHDHsNIGBcfUr4I:1265316545"
Message-Id: <e1nd8dn-0003np-00.kosy06-bk-ru@f281.mail.ru>

------oW5rFX7d-TRHDHsNIGBcfUr4I:1265316545
Content-Type: text/plain; charset=koi8-r
Content-Transfer-Encoding: 8bit