The FiltaQuilla add-on supports regular expressions. https://addons.mozilla.org/en-US/thunderbird/addon/filtaquilla/ https://addons.mozilla.org/en-US/thunderbi

The FiltaQuilla add-on supports regular expressions. https://addons.mozilla.org/en-US/thunderbird/addon/filtaquilla/ https://addons.mozilla.org/en-US/thunderbird/addon/filtaquil... If you look on the authors web page it describes how to use either JavaScript or regular expressions in the search field. http://mesquilla.com/extensions/filtaquilla/ http://mesquilla.com/extensions/filtaquilla/ Here is a related, tutorial-type blog post with screenshots: http://www.digiblog.de/2010/11/regular-expression-mail-filters-for-thunderbird/ http://www.digiblog.de/2010/11/regular-expression-mail-filte...