EditEmailSubject is a Thunderbird extension that allows you to change email subjects.
Since 2.0 version in the options:
1. Changes are done into local Thunderbird messages database, not into the message (Subject from Header doesn't change).
2. Changes are directly into header, so it is IMAP compatible.
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".
Product's homepage
Requirements:
· Mozilla Thunderbird
What's New in This Release: [ read full changelog ]
· Bugfix for binary attachments, a blank line was inserted into headers.
· Thanks to Achim Czasch for correction.