[sylpheed:32705] Certain Messages aren't beeing filteres

[Christoph Kobe]

Sylpheed 2.5
Windows XP SP1

Hi,

I'm trying to filter messages by checking the 'X-Spam-Flag' in the header against 'YES'. The
problem is that sylpheed only filters some of the messages. When I look at the header of two
different messages, I find both have the same X-Spam-Flag, but one gets filtered, the other not.

Any Ideas?

Christoph

---- Not filtered ----
Return-Path: <mcdh.faceto at aftabtech.com>
Delivered-To: spiky at kobenetz.de
Received: from nerdig.org (localhost [127.0.0.1])
	by mx-int.nerdig.org (Postfix) with ESMTP id 19149D0D5FCA
	for <spiky at kobenetz.de>; Sat,  8 Nov 2008 20:20:46 +0100 (CET)
X-Spam-Flag: YES
X-Spam-Checker-Version: SpamAssassin 3.1.7-deb (2006-10-05) on nerdig.org
X-Spam-Level: *********************************
X-Spam-Status: Yes, score=33.3 required=4.4 tests=AWL,BAYES_99,
	DATE_IN_FUTURE_12_24,FORGED_RCVD_HELO,HTML_50_60,HTML_MESSAGE,
	INVALID_DATE_TZ_ABSURD,RCVD_IN_BL_SPAMCOP_NET,RCVD_IN_XBL,
	SPAMMY_XMAILER,URIBL_AB_SURBL,URIBL_JP_SURBL,URIBL_OB_SURBL,URIBL_SBL,
	URIBL_SC_SURBL,URIBL_WS_SURBL autolearn=spam version=3.1.7-deb
...
--------

---- filtered ----
Return-Path: <fnfacyhn at boi.com.sg>
Delivered-To: spiky at kobenetz.de
Received: from nerdig.org (localhost [127.0.0.1])
	by mx-int.nerdig.org (Postfix) with ESMTP id DB883D0D5FCB
	for <spiky at kobenetz.de>; Sat,  8 Nov 2008 19:56:16 +0100 (CET)
X-Spam-Flag: YES
X-Spam-Checker-Version: SpamAssassin 3.1.7-deb (2006-10-05) on nerdig.org
X-Spam-Level: *********
X-Spam-Status: Yes, score=9.3 required=4.4 tests=BAYES_99,HTML_MESSAGE,
	HTML_TITLE_EMPTY,MIME_HTML_ONLY,RCVD_IN_XBL,URIBL_SBL autolearn=no 
	version=3.1.7-deb
...
--------