Editing Mail/Threading/Comparative (section)

== Thunderbird (version 128.6.0esr) ==
[[File:Thunderbird.png|alt=Thunderbird Threading|thumb|Thunderbird Threading]]The visual selection is clear, and there's a nice timeline graph on the left. I expected to find indentation for second-level threading, but it remains at one level.

About the threading behavior:

* Thunderbird displays threads with the original message at the top level, and subsequent emails within the thread are rendered from oldest to newest.
* The threading view can be toggled on or off for individual folders.
* Thunderbird does not currently offer an option to sort conversations in reverse order within a thread

The '''subject''' seems to '''appear on all messages under the same thread'''. I'm asking myself whether it is necessary or if '''it clutters the space''' without much point.