No dont use feisty packages in edgy. Thunderbird is almost impossiblet o use between versions like using feistys in edgy due to libc6 depends. We are unable to backport firefox and thunderbird as they dont meet the requirments. I will talk to Alexander(our mozilla maintainer) and see if he minds if i build an unofficial build for edgy and post it to my server. but if i do and you use it 1. you will get no support for it since it is unofficial 2. Upgrading thunderbird will not happen correctly. (example: if a security patch comes out for edgys thunderbird you will have to remove mine to install ubuntu;s version. 3. I will not keep up with security builds with the unofficial version.
With that stated let me know if you still want the build. -- Thunderbird doesn't support RFC-2369 based Reply-To-List https://launchpad.net/bugs/52667 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs