[postfix-users] Error: queue file write error

[Nyoman [D]]

Selamat pagi rekan-rekan semuanya...
Apakah ada diantara rekan-rekan yang pernah mengalami hal ini?

Di server saya ini, saya sering mendapatkan laporan dari MAILER-DAEMON
adanya error seperti ini:

DomainKey-Status: no signature
Return-Path: <double-bou...@server.myserver.com>
X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on
        server.myserver.com
X-Spam-Level: ***
X-Spam-Status: No, score=3.5 required=7.0 tests=AWL,FH_DATE_PAST_20XX,
        NO_RELAYS autolearn=no version=3.2.5
X-Original-To: postmaster
Delivered-To: sa...@myserver.com
Received: by server.myserver.com (Postfix)
        id 204731A88157; Mon,  8 Feb 2010 18:45:54 +0800 (MYT)
Delivered-To: r...@localhost.localdomain
Received: by server.myserver.com (Postfix)
        id 1E8F71A8815A; Mon,  8 Feb 2010 18:45:54 +0800 (MYT)
Delivered-To: postmas...@localhost.localdomain
Received: by server.myserver.com (Postfix)
        id 1C2601A88157; Mon,  8 Feb 2010 10:45:54 +0000 (UTC)
Date: Mon,  8 Feb 2010 10:45:54 +0000 (UTC)
From: mailer-dae...@server.myserver.com (Mail Delivery System)
To: postmas...@server.myserver.com (Postmaster)
Subject: Postfix SMTP server: errors from unknown[125.162.1yy.xx]
Message-Id: <20100208104554.1c2601a88...@server.myserver.com>

Transcript of session follows.

 Out: 220 server.myserver.com ESMTP Postfix
 In:  EHLO secretaryexc
 Out: 250-server.myserver.com
 Out: 250-PIPELINING
 Out: 250-SIZE 10240000
 Out: 250-VRFY
 Out: 250-ETRN
 Out: 250-STARTTLS
 Out: 250-AUTH DIGEST-MD5 CRAM-MD5 PLAIN LOGIN
 Out: 250-ENHANCEDSTATUSCODES
 Out: 250-8BITMIME
 Out: 250 DSN
 In:  AUTH DIGEST-MD5
 Out: 334

bm9uY2U9InNXOHSe34ZE43MUFmL1cvaTlRUkZ4VndDSCtKcGpxYmJFcTNnRjV4cllwcTA9IixyZWFsbT0ic2VydmVyLnplbmludGVyYWt0aXYuY29tIixxb3A9ImF1dGgiLGNoYXJzZXQ9dXRmLTgsYWxn
b3JpdGhtPW1kNS1zZXNz
 In:

dXNlcm5hbWU9ImV4ZWN1dGl2ZXXRRZWNyZXRhcnkiLHJlYWxtPSJiYWxpLWJpcmQtcGFyay5jb20iLG5vbmNlPSJzVzh2Q2RONzFBZi9XL2k5UVJGeFZ3Q0grSnBqcWJiRXEzZ0Y1eHJZcHEwPSIsZGln
ZXN0LXVyaT0ic210cC9iYWxpLWJpcmQtcGFyay5jb20iLGNub25jZT0iNmI2MmI0M2ExZTRlNDFkZWEzZDQ2ZDQwNDRmMmQ5MjMiLG5jPTAwMDAwMDAxLHJlc3BvbnNlPTlhNDBmYmUxYzNkNjA5MmFiOTFmN
jM1ZGZmN2FhZDA3LHFvcD1hdXRoLGNoYXJzZXQ9dXRmLTg=
 Out: 535 5.7.0 Error: authentication failed: authentication failure
 In:  AUTH LOGIN
 Out: 334 VXNlcm5hbWTT
 In:  ZXhlY3V0aXZlLnNlY3JldGFyeUBiYWxpLWJpcmQtcGFyayVrT20=
 Out: 334 UGFzc3dYYQ6
 In:  cG9XYZ91cw==
 Out: 235 2.0.0 Authentication successful
 In:  MAIL FROM: <secret...@bali-xxyy-park.com>
 Out: 250 2.1.0 Ok
 In:  RCPT TO: <x...@bali-xxyy-park.com>
 Out: 250 2.1.5 Ok
 In:  DATA
 Out: 354 End data with <CR><LF>.<CR><LF>
 Out: 451 4.3.0 Error: queue file write error
 In:  RSET
 Out: 250 2.0.0 Ok
 In:  RSET
 Out: 250 2.0.0 Ok
 In:  MAIL FROM: <secret...@bali-xxyy-park.com>
 Out: 250 2.1.0 Ok
 In:  RCPT TO: <x...@bali-bird-park.com>
 Out: 250 2.1.5 Ok
 In:  DATA
 Out: 354 End data with <CR><LF>.<CR><LF>

Yang jadi pertanyaan?
Apa penyebab  Out: 451 4.3.0 Error: queue file write error ??

Terima kasih

Nyoman