Add-on for Thunderbird or SeaMonkey which allows the replied, forwarded, and redirected flags on existing messages in Thunderbird and SeaMonkey.
This version of this add-on is maintained by Jonathan Kamens. Email questions and feedback to [email protected]. You may also email bug reports there, or post them on Github.
Thank you to Christian Eyrich, the original author of this add-on. This version is a fork of his version whose only changes (thus far) are to ensure compatibility with newer Thunderbird and SeaMonkey versions.
Source code: https://github.com/jikamens/ToggleReplied
Home page: https://addons.mozilla.org/thunderbird/addon/togglereplied-2/