Bug 392977

Summary: Threading from with same subject but different sender shows in wrong thread
Product: [Applications] kmail2 Reporter: Mike Harris <mike.a.harris>
Component: message listAssignee: kdepim bugs <kdepim-bugs>
Status: REPORTED ---    
Severity: normal CC: samuele.zappala
Priority: NOR    
Version: 5.19.3   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed In:
Attachments: These senders are two different email threads that shouldn't be grouped
Two messages in the same thread

Description Mike Harris 2018-04-10 18:48:14 UTC
In the inbox if an email has the same subject but different sender it shows in the thread of the wrong sender.

It should be it's own separate thread not added to the thread of a different person
Comment 1 Mike Harris 2018-04-13 19:59:52 UTC
Created attachment 112016 [details]
These senders are two different email threads that shouldn't be grouped
Comment 2 Samuele 2022-04-24 16:51:27 UTC
Same problem here:

SUMMARY
Messages from two different senders get grouped in the same thread because they have the same subject. As you can see in the attachments, those are two different people.
Those aren't messages sent to two different people who then replied. Simply, the subject of the email was the same.


STEPS TO REPRODUCE
1. Send two emails with the same subject
2. Receive an answer for each message sent. The received messages will have "RE: subject" as subject.

OBSERVED RESULT
They are grouped together in the same thread.

EXPECTED RESULT
They should have a different thread each.

SOFTWARE/OS VERSIONS 
Linux/KDE Plasma:  KDE Neon
(available in About System)
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.93.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION
Comment 3 Samuele 2022-04-24 16:52:29 UTC
Created attachment 148341 [details]
Two messages in the same thread