Windows version of Thunderbird is no longer connecting to my IMAP server using TLS. There is just a dot going back and forth on the inbox tab. I can view the old message, I've set it up to keep a copy, the UI seems to otherwise work, but Inbox just does not seem to connect. There is no error, nothing. Status bar says <email>: Connected to <mail.fqdn>... I'm using a self signed CA, that I have imported into the certificate manger to identify web sites and mail users. CN is set to the FQDN, thought there are other field in the subject too. On Arch Linux, the same Thunderbird version works just fine. Also, Android GMail is able to connect just fine. The server seems to work just fine.