On Sat, 10 Apr 2021 19:42:04 +1000 Peter Richards <peter777 at users.sourceforge.net> wrote: > Will a debug will reveal something ? Any specific files/folders like > the ~/.claws-mail/tagsdb ?? Or isn't it a tag ? It's not a tag. Each folder contains a .claws_mark file, which is where this flag is stored. with regards Paul