I tried to find a thunderbird plugin which can do this:
Display a button on the top of the message (while reading, not composing) "move message to folder '...'".
The plugin checks the "from" header of the mail and remembers (or searches) where the last mails of this sender were moved to. In about 95% of my cases the plugin could guess the correct folder. The algorithm is quite easy: move the mail to the folder, which was used the last time for this from-address.
This could help to keep the inbox clean.
I know a lot of people which have a huge inbox folder because they are to lazy (or busy) to move mails into subfolders.
I don't like the manual way: right click, move message to folder "...". And the archive feature of thunderbird does not help me. I want to keep mails separated.
Any idea how to keep the mail inbox clean by moving mails to subfolders in a way that is easy and fast?
Filters don't solve my problem: I want to see all mails in my Inbox. After reading and handling the mail I want to move it to an other folder.