How do I mark a message as important?
A star sets a message aside: you can find it again in one click in Favoris (Favorites).
Step by step
In the message list, click the little star at the end of the message’s line (Ajouter aux favoris (Add to favorites)). It turns yellow.
To find all your starred messages: click Favoris (Favorites) in the folder column, or the Favoris (Favorites) filter above the list.
To remove the star: click it again (Retirer des favoris (Remove from favorites)).