I have two laptops - my main one is stationary and the other one I take with me on trips. They both run Fedora Linux 35, and they both have Thunderbird installed. When I am going on a trip, I copy the whole .thunderbird folder from my "stationary" laptop to the other laptop, since the accounts are POP3 and I would like the most recent mails on the other laptop as well. However afterwards, when the second laptop starts fetching mail, I get lots of "Unable to move mail to XXXX folder, because it does not exist" -- something along those lines.. I look and the XXXX folder exists actually. These messages are probably coming from my filters. What I do then is to take the machine offline, and then using the down arrow, go thru the entire folder list on the left. As I do that, the numbers of messages in each folder appear, and once I am done, I no longer have issues like the "Unable to move".. Is there anything else that I should be doing instead of this down arrow? because it's a bit of a pain and it takes time.. If there is a better way to sync these laptops, please let me know.. I tried rsync before too - that works but the same issue persists, the "unable to move".. Many thanks, -turgut