Hello, I have the following rules: ## strict_threads are default folder-hook . set sort=threads strict_threads ## except for folder starting with a lowercase letter folder-hook =[a-z] unset strict_threads When I access the "mutt-users" folder the first time with "mutt -y" strict_threads are set. However when selecting the same folder a second time with "c<TAB> etc.." strict_threads become unset. What is wrong with my setup? Thanks,