[Evolution] About threaded message view

[Paul <listes paul nosphere org>]

Hi all,

I feel that the threaded view in evolution-mail isn't working very well.
It seems based on subject (??? why ???).
I used to use gnus that thread mail messages based on their Message-ID
wich are unique, even if someone change the subject inside a thread.
Maybe i'm dumb and didn't find the right option ?
Does someone has tips on this ?

Thanx
Paul.