За последние месяца 3 раза 3-4 происходит следующее: по каким то причинам возникает ошибка тоссера и затем блокируется ящик:

15:06:10 298105 ting_tin9thanh@agirlsworld.com!POP3!959441764!9
15:06:10 298105 For: ххх@bazis.omsknet.ru
15:06:10 298105 Non existent local user: ххх
15:06:10 298105 Toss file error: 6
15:06:10 298105 Tosser error:6
15:06:10 298105 uwkqk@blueberrycake.com!POP3!959442515!39
15:06:10 298105 For: ххх@bazis.omsknet.ru
15:06:10 298105 Non existent local user: ххх
15:06:30 298105 Tosser: Can't access mailbox!
15:06:30 298105 Unable to access some boxes. Will try later.-4020

Почта для несуществующего юзера падает в отдельный ящик, так в нем письмо просто прерывается в , например так:
Received: from NULL ([195.162.32.5]) by dionis.omsknet.ru with SMTP; Mon, 13 Oct 2008 14:59:06 +0700 (OSD)
(envelope-from ting_tin9thanh@agirlsworld.com)
Received: from 60.169.46.115 ([60.169.46.115]) by ns.omskelecom.ru (8.13.4/8.13.4/Debian-3sarge3) with ESMTP id m9D7wpJw025486 for <ххх@bazis.omsknet.ru>; Mon, 13 Oct 2008 14:58:54 +0700
Message-ID: <000501c92d09$01a528e2$ef7ce690@kjosc>
From: =?koi8-r?B?4cTSycHO?= <ting_tin9thanh@agirlsworld.com>
To: <ххх@bazis.omsknet.ru>
Subject: [spam] =?koi8-r?B?9MXQzM8g1yD3wdsgxM/NIMkgz8bJ0w==?=
Date: Mon, 13 Oct 2008 06:11:50 +0000
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="

---

=_NextPart_000_0002_01C92D09.01A380B2"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.3138
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198
X-Text-Classification: spam
X-POPFile-Link: http://proxy:9090/jump_to_message?view=341603

This is a multi-part message in MIME format.

---

=_NextPart_000_0002_01C92D09.01A380B2
Content-Type: text/plain; charset="koi8-r"
Content-Transfer-Encoding: quoted-printable

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=F0=CF=CC=CE=D9=CA =D3=D0=C5=CB=D4=D2 = =D4=C5=D0=CC=CF=D7=CF=C7=CF =CF=C2=CF=D2=D5=C4=CF=D7=C1=CE=C9=D1 =D0=CF = =D3=D7=C5=D2=C8=CE=C9=DA=CB=C9=CD =C3=C5=CE=C1=CD!
<DIV align=3Dleft><STRONG><FONT face=3DVerdana = color=3D#006600 size=3D2>- =F4=C5=D0=CC=CF=D7=D9=C5 =DA=C1=D7=C5=D3=D9 =
</FONT><FONT face=3DVerdana color=3D#ff0000 = size=3D2>(=C2=C5=D3=D0=CC=C1=D4=CE=D9=CA =CD=CF=CE=D4=C1=D6 = =DA=C1=D7=C5=D3 =CF=D4 200-=CA =D3=C5=D2=C9=C9!)</FONT></STRONG></DIV> =
<DIV align=3Dleft><STRONG><FONT face=3DVerdana color=3D#006600 = size=3D2>- =F4=C5=D0=CC=CF=D7=D9=C5 =D0=D5=DB=CB=C9 =
(=DC=CC=C5=CB=D4=D2=C9=DE=C5=D3=CB=C9=C5, = =C7=C1=DA=CF=D7=D9=C5, = =C4=C9=DA=C5=CC=D8=CE=D9=C5)</FONT></STRONG></DIV> <DIV = align=3Dleft><STRONG><FONT face=3DVerdana color=3D#006600 = size=3D2>- =F4=C5=D0=CC=CF=C7=C5=CE=C5=D2=C1=D4=CF=D2=D9 =
(=C7=C1=DA=CF=D7=D9=C5, =C4=C9=DA=C5=CC=D8=CE=D9=C5, =CE=C1 =
=CF=D4=D2=C1=C2=CF=D4=C1=CE=CE=CF=CD = =CD=C1=D3=CC=C5)</FONT></STRONG></DIV> — = =F3=C5=DA=CF=CE=CE=C1=D1 =C1=CB=C3=C9=D1 — =D0=D2=CF=C5=CB=D4 =D0=CF=C4 = =CB=CC=C0=DE: =CF=D2=C7=C1=CE=C9=DA=C1=C3=C9=D1 = =DC=CB=CF=CE=CF=CD=C9=DE=CE=CF=C7=CF =CF=C2=CF=C7=D2=C5=D7=C1 =C9 = =D7=C5=CE=D4=C9=CC=D1=C3=C9=C9 =D0=CF=CD=C5=DD=C5=CE=C9=CA =

Что можно предпринять в данном случае?
Спасибо.