為何內文過濾會有失敗的狀況發生

[BigDanny]

舉例：我在內文過濾設定〔CTXE〕字句，但有時可以成功阻擋有〔CTXE〕字句的郵件，但有時卻無法順利阻擋，本以為是編碼或斷行的問題，但打開信件一看，根本沒有編碼或斷行，是單純的文字，那為何無法順利阻擋？

不只是〔CTXE〕字句，而且不管是中文或英文，其它的字句也有這問題

另外有些正規表示也會發生無法順利阻擋的狀況
舉例：[!][PCRE](@aaa.idv.tw)|(@bbb.com.tw)|(@ccc.com)
說明：這是因為我有多個網域，為了阻擋收件者不是這幾個網域範圍或者是空白的郵件，大部份的狀況是可以成功阻擋，但還是會發生無法順利阻擋的狀況

以上這種狀況，每天都會發生，一天都會有十多封這種應該被阻擋，卻順利偷跑進來的垃圾郵件


以下是其中一封信，紅色是符合〔CTXE〕字句的地方，但卻沒被過濾出來
============================================
Received: from VARUN.mn5ck.net ([59.176.28.101])
by mail.***.***.tw ([***.***.***.***]);
Mon, 29 May 2006 17:50:10 +0800
Received: from unknown (HELO mx3.hotmail.com) (65.54.245.72)
by VARUN.mn5ck.net with SMTP; Mon, 29 May 2006 15:18:38 -0500
From: "Tonya" <[email protected]>
To: <master@***-***.com>
Subject: get inside now - C T X E
Date: Mon, 29 May 2006 15:18:38 -0500
MIME-Version: 1.0
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106
Thread-Index: MPmWiKL3DS7fTSEASzpOXXTeZ3Ih7E2Og19d
Content-Type: text/plain;
charset="Windows-1252"
Content-Transfer-Encoding: 7bit

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[Arnor]

你寄給我這些資料, 這樣測才知道.
1. contentfilter.cfg
2. 該帳戶的whitelist.txt, addressbook.txt
3. 5/29 的 dtl log
4. 上述該信的 zip 檔 (至少我要知道檔名才能知道它位於log 中哪個位置)
5. users.cfg
_________________
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*若是回報疑似軟體的運行或邏輯或資料處理有誤的問題, 小弟很樂意去了解您的情況, 但請務必以最新版來做回報, 如果以郵件詢問, 請參考 http://www.raidenmaild.com/tw/feedback.html 的說明, 最好標題加個 RaidenMAILD 字樣, 才不致會遺漏了您的信唷. 謝謝您的配合^^*
*在版上發文請遵守網路禮儀, 並請持著虛心敘述問題請教他人, 凡發現違反的文, 均一律刪除為優先, 不另行通知喔.
*與使用者教學相長腦力激盪是我輩成就感的來源, 誠心希望您能不吝指教.
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素還尊
Team John Long.
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[BigDanny]

已經寄出了，麻煩您了