Suddenly it is no longer possible to move an e-mail between 2 imap gmail accounts. I get this error message : "server has disconnected The server may have gone down or there may be a network problem" I tried lowering this setting but that does not work : 'Maximum number of server connections to cache' I think it is a bug in thunderbird 91.3.0 (mac os). On my other laptop it still works on Thunderbird version 78.14.0 It wants to update to 91.3.0, but of course I refuse. What is going on ? And why is it upodating from 78.14.0, directly to 91.3.0 ? The version numbers are very different.