From/To Column is a Thunderbird and SeaMonkey extension that adds a new header called "From/To" in the message list, designed to display the recipients and the sender.
From/To Column is compatible and designed to work with SeaMonkey 2.9 and later & Thunderbird 8.0a1 and later.
How to Install in Thunderbird:
1. Right-click the link below and choose "Save Link As..." to download and save the file to your hard disk.
2. In Mozilla Thunderbird, open Add-ons from the Tools menu.
3. Click the Install button, and locate/select the file you downloaded and click "OK".
· Mozilla Thunderbird