The reason for this is that my 10GB inbox suddenly doubled to 20GB as it re-downloaded all e-mails again for no obvious reason. Such a tool would not be so hard. Manually sorting this is going to take days
Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.
Perhaps use the addon that has been available since V68 at least. https://addons.thunderbird.net/en-US/thunderbird/addon/removedupes/?src=ss
I have repaired my Inboxes multiple times and yet I am getting 1000's of the same emails, over & over again. As soon as I delete them they start populating again! Either someone finds a way to automate this I will leave and find another program. I don't want to do it, because I really like the way Tbird works and the way it is structured and, I know how to use it.
Thank you -
I then downloaded & tried the Addon suggested recently - No Luck. I tried the version that was updated to run with newer versions of TB - still no luck.