I want to take email messages and sort them in to subfolders in my IMAP account using my MUA, Mozilla Thunderbird.
I set a filter "move firstname.lastname@example.org" to match and it moves the emails to subfolder "bob".
Then I set a filter "move subject:'IT helpdesk answer'" to match and move to a different subfolder "helpdesk".
The mails get shuttled between the two subfolders perpetually if the two filters match.
I can hack it by adding an AND with "is not tagged as 'moved'" then add an action to each message filter that adds a tag 'moved'. However this means a new filter is needed for every filtering characteristic (like I want to filter 50 different partial email addresses in to a 'shopping' folder; I'd need to make 50 filters), I can no longer do "move email@example.com or firstname.lastname@example.org to 'friends' subfolder" - it would instead take two filters because Thunderbird can't do compound logic (it can't do 'NOT tag AND (A OR B)'; it can do 'NOT tag AND A').
There's a "stop filter execution" but it doesn't seem to do anything.
How am I supposed to do this in Thunderbird (on Kubuntu 18.04.1), I just want to presort emails in to different folders as they arrive. Thanks.