Hello, sorry for my bad English, Thunderbird is no longer able to receive messages from both my e-mail accounts. The IMAP servers configuration did not change. There is no error message popping up, but the serpentine turns forever. It is still able to receive news from RSS/Atom feeds. When I close Thunderbird, it remains running in background (if I try to start it again, it prints "Thunderbird is already running, but is not responding. To open a new window, you must first close the existing Thunderbird process, or restart your system."). I uploaded a screenshot of my error console in the topic images. Thank you in advance for your help!