Add-ons
Remove Duplicate Messages (Alternate) 0.3.17b1 Requires Restart
by Eyal Rozenberg
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
![[Warning]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=918fd500-6215cc02)
Permissions
About this Add-on
(As Thunderbird is undergoing massive changes under the hood, always look for a beta of this extension for support of the latest Thunderbird version. You are also welcome to report bugs or write me.)
The original 'Remove Duplicate Messages' is missing important features, and does not have a free software license. This is a full rewrite, with an GPL-LGPL-MPL license. Performance has been improved and many features and capabilities have been added, including:
- Choice of comparison criteria (subject, author, date, etc).
- Comparison of message bodies.
- Action on multiple folders.
- Review dialog for double-checking which duplicates to delete and which to keep.
- Good performance on local folders with large number of messages; reasonable performance with IMAP and RSS accounts.
- Spiffy toolbar button+menu.
There's also a SeaMonkey version, though not as frequently tested.
The original 'Remove Duplicate Messages' is missing important features, and does not have a free software license. This is a full rewrite, with an GPL-LGPL-MPL license. Performance has been improved and many features and capabilities have been added, including:
- Choice of comparison criteria (subject, author, date, etc).
- Comparison of message bodies.
- Action on multiple folders.
- Review dialog for double-checking which duplicates to delete and which to keep.
- Good performance on local folders with large number of messages; reasonable performance with IMAP and RSS accounts.
- Spiffy toolbar button+menu.
There's also a SeaMonkey version, though not as frequently tested.
