Add-ons
DeleteSimilar 1.3 Requires Restart
by FileAnt
Auto-delete similar newer incoming RSS messages.
No GUI (Hands free). To make it work you just rename the RSS folder to start with a minus.
i.e. Google News to -Google News
Uses Trash. Keeps oldest message to preserve Read status.
![[Warning]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=b00ed3ed-652d8172)
Permissions
About this Add-on
I wrote this because many news feeds have duplicates and similar stories. In a nutshell, if the first 15 characters of a subject in a monitored folder match then the newest message is deleted (to preserve the one you may have read already).
To monitor a folder rename the pretty name of the folder to begin with a minus sign (-)
i.e. -news
Note: It will only check a message subject as it arrives, but it will delete all but the oldest match when it does the compare. It will use the Trash.
Some content providers prefix their messages with their name followed by a ":" so delete similar will ignore everything before a ":" when it does the compare.
To monitor a folder rename the pretty name of the folder to begin with a minus sign (-)
i.e. -news
Note: It will only check a message subject as it arrives, but it will delete all but the oldest match when it does the compare. It will use the Trash.
Some content providers prefix their messages with their name followed by a ":" so delete similar will ignore everything before a ":" when it does the compare.
