Hello ! I lost track of a few emails by doing the following: 1) I created a new folder in Thunderbird 2) I selected a few emails and dropped them in this new directory 3) I noticed that they were in the new directory, but grouped together in the same ‘discussion’. 4) I removed the grouping by discussion criterion and there were no more messages in the new directory, just the following message ‘No messages found’. 5) I've gone through all the directories, but there's no trace of these emails! ... => how do I retrieve these missing messages? Thanks for your help