Changes

Only if we had capability to assign multiple labels to a message. (And have an easy way to create new labels. Of course we need more than 5) We could do away with the need to create folders and filing messages. I would like to add some remarks concerning this feature (for me it would be a significant improvement) An email can belong to many labels (e.g. different projects or relations -family, friend, professional etc...).  This could also allow the user to insert an email in the discussion list. I receive many times answers from users which changes the title of the initial email. Thus currently such emails cannot belong to the initial discussion. Such feature can really improve a message search.Such proposal can also resolve or help to develop some other items like[[https://wiki.mozilla.org/Thunderbird:Collected_User_Requests#Link_between_message_and_reply]] [[https://wiki.mozilla.org/Thunderbird:Collected_User_Requests#Filter_Grouping]][[https://wiki.mozilla.org/Thunderbird:Collected_User_Requests#Label_button_in_toolbar]][[https://wiki.mozilla.org/Thunderbird:Collected_User_Requests#Take_over_some_very_interesting_features_from_Opera_M2_Mail]] This could be based on a database management like MySQL. The sender, receivers list, date, subject ... could be one of the default database key (label).