Version: 1.12.4 (using KDE 4.3.5) OS: Linux Installed from: Mandriva RPMs Hello, I noted that kmail does not group together all mail of the same mailing list. For instance, kmail regroups correctly every mail about the same bugs from bugs.kde.org but it does not for Mandriva bugs. You can read this subject (https://qa.mandriva.com/show_bug.cgi?id=56737) to understand the problem. Mandriva bugs are correctly regroup with Thunderbird, so Mandriva developers think problem is due to kmail.
Thank you for taking the time to file a bug report. KMail2 was released in 2011, and the entire code base went through significant changes. We are currently in the process of porting to Qt5 and KF5. It is unlikely that these bugs are still valid in KMail2. We welcome you to try out KMail 2 with the KDE 4.14 release and give your feedback.