F-DroidSep 6, 2025

PSA: If you haven't updated #K9Mail to 12.0, please don't update it. It will crash on start if you use the unified inbox. The bug has been fixed in 12.1 and will be available in the next #FDroid update. #Thunderbird is not affected, kind reminder to consider switching as K-9 will go away in the future anyway.

Workaround for now: Make a widget for a single mailbox, then you can open K-9, you can change accounts and disable unified inbox.

Show threads3lph
@fdroidorg to add to that: Switching from #k9mail to #thunderbird is a matter of seconds; Thunderbird can import all accounts and settings from K9 at the press of a few buttons.
Sep 7, 2025 at 12:44pmWeb
Show threadPhilipp Sep 8, 2025
@s3lph it only can if you exported your settings from K9Mail though, afaik. Which you should do regularly perhaps, but you can't with your current settings if the app can't be started.
Show threads3lphSep 8, 2025
@derfopps The option to import an exported settings file you describe does exist ("Select file"). However, Thunderbird can also import the settings directly from K-9 Mail ("Import from app") through the Android ContentProvider API. This import doesn't require the user to export settings first.
Show threadPhilipp Sep 8, 2025
@s3lph Oh, didn't know that!