Did you had the chance to verify what is the selection of the "run selected fukter(s) on:" if it states "choose a folder" then it's a good reason to not be able to use the "run now". It's a degradation from my point of view. Eliezer On 06/03/2016 21:52, Bernard Lheureux wrote: > Hi all, > > > Since the last update of Thunderbird to 38.6, the button 'Run Now' of > the 'Mail Filters' option is no longer effective and appears always > grayed in my CentOS 7... > Anybody has the same behavior ? >