1380648 - One email is filed as a reply to another email in the conversation tree, although they are not related

Status: RESOLVED INVALID

(Thunderbird :: Folder and Message Lists, defect)

Description

[Daniel]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36

Steps to reproduce:

I received two emails that are not at all related.


Actual results:

One of the two emails is incorrectly filed as a reply to the other one in the conversation tree, although there is no relation whatsoever between them.

This can potentially lead to serious confusion, as it leads to some emails being hidden down the conversation tree of other emails. If you regularly collapse your conversation trees, then you risk overseeing some of your emails.

Whenever Thunderbird is in doubt whether one email is a reply to another one, it should not assume that they are.


Expected results:

None of the two emails should be misinterpreted as a reply to the other.

Comment 1

[Jorg K (CEST = GMT+2)]

By "conversation tree" you mean the "thread pane"? Or are you referring to the add-on Conversations?

In general an e-mail can be displayed in the wrong thread if the internal references are incorrect. Can you please look at the message source (View > Message Source) and report the References of the incorrectly filed message as well as other messages in the same thread.

Comment 2

[Daniel]

I do mean the "thread pane".
It is a fresh install of Thunderbird, without any add-ons (except Lighning, which was preinstalled).

What precisely do you mean by "references"? I did a text search on the term "refe" in the source of the mails, but did not find any occurrence.

Comment 3

[Daniel]

What is also strange is that if I save the mails on my hard disk, and then import them, they are properly separated, i.e. none is regarded as a reply of the other one.

Comment 4

[Daniel]

This is the source code of the first mail, slightly anonymized:

Date: Thu, 13 Jul 2017 00:37:09 +0200
From: ___ ___ <[e-mail]>
To: [e-mail]
Subject: ___
User-Agent: K-9 Mail for Android
Message-ID: <[e-mail]>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----LT7KIJLO0QE6ZAJ3DKIJAPTRUAFJBR"
Content-Transfer-Encoding: 7bit
X-Antivirus: Avast (VPS 170712-10, 12.07.2017), Inbound message
X-Antivirus-Status: Clean

------LT7KIJLO0QE6ZAJ3DKIJAPTRUAFJBR
Content-Type: text/plain;
 charset=utf-8
Content-Transfer-Encoding: quoted-printable

___
--=20
Diese Nachricht wurde von meinem Android-Ger=C3=A4t mit K-9 Mail gesendet=
=2E
------LT7KIJLO0QE6ZAJ3DKIJAPTRUAFJBR
Content-Type: text/html;
 charset=utf-8
Content-Transfer-Encoding: quoted-printable

___<br>
-- <br>
Diese Nachricht wurde von meinem Android-Ger=C3=A4t mit K-9 Mail gesendet=
=2E
------LT7KIJLO0QE6ZAJ3DKIJAPTRUAFJBR--

Comment 5

[Daniel]

And this is the mail that is incorrectly classified as a reply to the first one:

Return-Path: <[e-mail]>
Received: from maile-gc.linkedin.com ([108.174.0.195]) by mx-ha.gmx.net
 (mxgmx117 [212.227.17.5]) with ESMTPS (Nemesis) id 1MlePK-1dvsnX3KE6-00ijLX
 for <[e-mail]>; Tue, 11 Jul 2017 09:23:42 +0200
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linkedin.com;
	s=proddkim1024; t=1499757820;
	bh=bZF6cfwYz/vA/I74nB51DIZ8oxk6bRQR19qQ06qqVCE=;
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	 X-LinkedIn-Template:X-LinkedIn-fbl;
	b=MrY/hiENZO7rSomwNA6S5InQffHxNHX3QSBJgH385vK9YaaNGD+VmwDmUACYLYs71
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	 S1YMdBHTRXFiQhO8NgcwPHbeU0aVgIekTENqpEsk=
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	s=proddkim1024; t=1499757820;
	bh=bZF6cfwYz/vA/I74nB51DIZ8oxk6bRQR19qQ06qqVCE=;
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	 X-LinkedIn-Template:X-LinkedIn-fbl;
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	 0PFy1P42KTU7pIuXbhyUZXr1B5fzlNdFNXs4isJI=
From: LinkedIn <[e-mail]>
Message-ID: <[e-mail]>
Subject: ___
MIME-Version: 1.0
Content-Type: multipart/alternative; 
	boundary="----=_Part_3293927_496975332.1499757820129"
To: ___ ___ <[e-mail]>
Date: Tue, 11 Jul 2017 07:23:40 +0000 (UTC)
X-LinkedIn-Class: EMAIL-DEFAULT
X-LinkedIn-Template: what_you_missed_v2
X-LinkedIn-fbl: m2-at002sg2524obapwwwfmwjksq7mbteklzsrxypf3048pd2czpjlprqwmwa2o6sgztq8hwv008cfpnjbydohfjtfyl7cx2sbz3na05h
X-LinkedIn-Id: 6uwu6z-j4yyxqz4-m
List-Unsubscribe: <___>
Require-Recipient-Valid-Since: [e-mail]; Sat, 4 Apr 2015 19:59:13 +0000
Envelope-To: [e-mail]>
X-GMX-Antispam: 0 (Mail was not recognized as spam); Detail=V3;
X-GMX-Antivirus: 0 (no virus found)
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Content-Type: text/plain;charset=UTF-8
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___

See what's new >=20
___

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Comment 6

[Daniel]

Thanks for looking into this! Thunderbird rocks!

Comment 7

[Daniel]

I forgot to mention: the first mail in this specific case was >outgoing<. But I did also observe this phenomenon in cases where both mails were incoming.

Comment 8

[Daniel]

Perhaps one thing might be relevant: in a conversation thread, I sometimes delete some of the mails within the thread to keep the tree small. Sometimes I even delete all mails in a tree except the most recent reply. Could this lead to Thunderbird getting confused?

Comment 9

[Jorg K (CEST = GMT+2)]

References: is an e-mail header that you can see in the message source, for example, every BMO mail has:
References: <[e-mail]/>

In the messages you published, I can't see any such headers. Given that the threading is correct when you import (comment #3), it would be best if you could provide me with the mailbox that shows the problem. As this will contain personal details, Zip up the mailbox file and send it to me as attachment in a private message (view my profile to see the e-mail address). I will try to look into the issue when I find the time.

Have you tried repairing the mailbox? Right-click, Properties, "Repair Folder".

Comment 10

[Daniel]

I forgot to mention that the mails are actually in a GMX account, if that matters, not in the "local folder" of Thunderbird.

Repairing the folder worked. But of course, that can not be the solution of the problem.

Comment 11

[Jorg K (CEST = GMT+2)]

(In reply to Daniel from comment #10)
> Repairing the folder worked. But of course, that can not be the solution of
> the problem.
That *is* the solution of the problem. We can't track down any small glitch which you have now eliminated by repairing the folder. Sorry.

Comment 12

[Daniel]

But this problem occurs regularly, and is not just cosmetical. It diminishes my trust in Thunderbird to organize my mails properly. Actually, I would say this problem is even moderately critical.

Comment 13

[Jorg K (CEST = GMT+2)]

OK, when you have a reproducible case, we can reopen the bug, no problem. It makes a little harder that the folder in question is an IMAP folder, but I guess you could still zip up the local copy.

Comment 14

[Daniel]

It's impossible for me to reproduce this bug actively, because I have no idea what causes it; but it does occur from time to time. Of course, I could turn off the "thread tree" feature, but if possible I would like to keep using it.

I did zip up my local Thunderbird profile, but your mail server did not let it through.