I had just started utilising Folders. Today I wanted to move an important email where I could easily find it again. I created a new folder, went to the inbox, clicked on the email in question and moved it to the new folder. Then I went to the new folder to check that it was there safely and it was and I shut down my laptop. Later I got home to start work. I looked for the file and the folder was empty. I ran the search that I had run previously and it now returned nothing found. The email had vanished. I moved some rubbish emails to the same folder, none of them arrived there, all have disappeared and are not to be found in the deleted folders either. Really annoying and frankly a deal breaker for using this software going forward without a satisfactory solution. Running Linux Mint on a Lenovo ThinkpadT490 Many thanks