Sent mail
After I send an email Thunderbird hangs up trying to save it. When I cancel it and check the sent folder, the email is there. I believe this is a bug.
Wšě wotmołwy (2)
Does it happen with Windows started in safe mode? https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode
I haven't tried in in safe mode however I have found that it doesn't hang up any more but it stores sent mail in my trash folder.