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56 MarkR.Andersom@amd.com using -f
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57 From: Mark Anderson <markr.anderson@amd.com>
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58 To: Marten Veldthuis <marten@veldthuis.com>, Carl Worth <cworth@cworth.org>,
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59 notmuch <notmuch@notmuchmail.org>
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61 <87my1kkzbn.fsf@marten.i-did-not-set--mail-host-address--so-tickle-me>
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62 References: <1260400470-sup-5775@testarossa>
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63 <87ws0ug23f.fsf@yoom.home.cworth.org>
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64 <87ljha3avx.fsf@home.veldthuis.com>
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65 <87ocm64ivu.fsf@yoom.home.cworth.org>
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66 <87my1kkzbn.fsf@marten.i-did-not-set--mail-host-address--so-tickle-me>
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67 Date: Wed, 23 Dec 2009 15:07:47 -0700
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72 FILETIME=[5D5DCEA0:01CA841C]
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73 X-Reverse-DNS: ausb3extmailp02.amd.com
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74 Subject: Re: [notmuch] Threading
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75 X-BeenThere: notmuch@notmuchmail.org
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78 List-Id: "Use and development of the notmuch mail system."
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79 <notmuch.notmuchmail.org>
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87 X-List-Received-Date: Wed, 23 Dec 2009 22:08:06 -0000
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89 On Tue, 15 Dec 2009 16:54:20 +0100, Marten Veldthuis <marten@veldthuis.com> wrote:
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90 > On Thu, 10 Dec 2009 13:30:13 -0800, Carl Worth <cworth@cworth.org> wrote:
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91 > > But I still have a hard time justifying user operations to manipulate
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92 > > threading. The whole point of threading is to make it faster to process
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93 > > and read messages. But manual operations like joining and splitting
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94 > > threads seem like the user just doing more work, and that *after* having
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95 > > read the messages. So that seems mostly backwards to me.
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97 > By the way, Outlook & Exchange suck (or at least some versions do), and
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98 > don't seem to generate In-Reply-To and References: headers. Just got a
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99 > mail which prompted me to write this mail. I'd really like to be able to
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100 > join messages in a case like this.
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102 It's actually worse than that. I was looking into why some of my
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103 threads weren't coalescing. Some of it seems to be a very difficult bug
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104 DB that doesn't use identical Message-ID's to refer to the parent bug
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105 mail. I don't know how that works at all. Sometimes it uses the same
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106 Message-ID, but sometimes it changes a number in the ID.
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108 However, this isn't the worst news, because I work with a lot of
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109 Exchange users, and I noticed that their mail was also refusing to
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112 I was looking at the message bodies, and they led me to these links
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113 about mail processing.
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115 The problem identified:
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116 http://blog.postmaster.gr/2007/12/11/trying-to-make-use-of-outlooks-thread-index-header/
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118 How to read it, or how Exchange goes its own way:
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119 http://blog.postmaster.gr/2007/12/23/more-fun-with-message-threading/
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121 With a fairly loose understanding of how notmuch detects threads, and
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122 how much information it places in the Xapian database (only the
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123 msg-id?), I can't suggest much of the how.
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125 But I would like to propose that we consider handling the Exchange
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126 non-standard threading method as well as the RFC822 threading in the
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