1105195 - Grouping of messages (threading) with same subject not working

Status: RESOLVED DUPLICATE of bug 477744

(Thunderbird :: Untriaged, defect)

Description

[Or Schiro]

Attachment: Messages with same subject are not grouped by thread

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:33.0) Gecko/20100101 Firefox/33.0
Build ID: 20141115160330

Steps to reproduce:

I have a number of emails with the same subject (see the attached screenshot). However, as you can see they are not grouped into one thread.

I have set View->Sort by->Threaded and also changed the following about:config settings:

mail.thread_without_re from false to true
mail.strict_threading from true to false

Is this a bug or do I need to change some other configs to make Thunderbird recognise similar subjects?

Thank you for your advice!

Robert