Dear community, As I am not very proficient with e-mails, I am writing to you for help. I am using an IMAP account with the thunderbird app on a Mac. I have the following problem: While on a 5-hour flight I used my time to move around 500 mails into about 20 local folders. I had no internet access, but hadn't clicked on the offline mode either. Job done, my inbox was finally clear. When I landed, my phone connected to a WiFi network and my mail client app refreshed. Later on, I opened my computer, connected it to a network and opened the Thunderbird app in order to "sync" the work done during the flight and wait for the 500 mails to actually get deleted from the server. To my surprise, I saw in the status bar that 500 mails were being downloaded. Now I have all those mails both in my inbox and local folders and I wish them to be in the latter only... Is there a way to fix that and for those moved messages to be deleted from the server? Manually going through all of them and deleting the ones present in a local folder would take even more time then the 4 hours I have spent initially. Thanks for your support!