Review for Edit Email Subject (EES) by Cashie
Rated 5 out of 5 stars
Great Add-on but unfortunately not 5 Stars after recent Thunderbird 68 update .
Please update this so it works again.
There is a workround if you drag the email to Drafts edit it and drag it back. However it does change the Sender as well.
The add-on is now compatible with TB68 as well. It just took a little longer.
To create your own collections, you must have a Mozilla Add-ons account.