procmail regex help ... sometimes works, sometimes doesn't...

George Sanders gosand1982 at
Sun Mar 28 22:34:33 UTC 2010

I have added a very standard, very common regex line to my .procmailrc to filter character sets I can't read:

* ^Content-Type:.*multipart
* B ?? $ ^Content-Type:.*^?.*charset="?($UNREADABLE)

I know that this works because my "unreadable_messages" mail file is now full of messages with headers like:

From: =?GB2312?B?xMLTq9Or?= <uigvrutit at>
Subject: =?GB2312?B?MjAxMMTqyMvBptfK1LS4w9bYytPKssO0?=
To: "me" <me at>
Content-Type: text/html;

However, a lot of mail gets through to my inbox that matches:

From: "osdeiiftnvpp at" <xjyfgzyjm at>
Reply-To: "osdeiiftnvpp at" <xjyfgzyjm at>
Message-ID: <533pbxxy2oc>
To: me <me at>
Subject: Fw: \xb8\xf2\xad\xe8\xa5X\xa8\xd3\xbd\xe6~\xb1o\xb4\xa9\xa9f\xaa\xb1\xb5L\xaeM\xa4\xba\xaeg\xb2n\xa7o
X-Mailer: inhalation
Organization: Microsoft Outlook Express 6.00.2462.0000
Mime-Version: 1.0
Content-Type: multipart/alternative;
Status: RO
X-UID: 63502

Content-Type: text/plain; charset="big5"
Content-Transfer-Encoding: quoted-printable

However, "big5" is very clearly listed in my regex above, and as far as I can tell, this mail should match perfectly...

I cannot see why these "big5" emails are not matching my procmail regex ... is it obvious to anyone ?


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