Just switched my todo list management to tasks.org and wondered why the sub-tasks didn't show as such in Thunderbird. It would be wonderful to have this feature, since the integration of todos is already quite nice (e.g. converting a task to appointm...
This feature would be fantastic!! It would benefit so many to-do and GTD workflows... There used to be an add-on called Thunderlink that provided a similar functionality but it has been discontinued since TB 38.