How do I completely disable TB's attempts to tag/flag/judge email as junk?

Question

I don't want TB to touch my emails with ANY junk classification.
I don't want it to display 'junk' icons.
I don't want it to 'think' a message is junk mail.
How do I permanently, completely and irreversibly disable any and all code in thunderbird that messes up my precious messages and tags them as junk. I'm ok with deleting it's bs database of junk/not junk. It was worthless anyway.
I want it to go away. I never want to see any mentions of 'junk' in my thunderbird setup.
Seriously. Please stop defecating all over my email. There MUST be a way to disable this...
I've seen every google link coming up after typing 'thunderbird disable junk filtering', three pages in. Similar searches too. Any and all advice remains useless. 'Thunderbird thinks this message is junk mail.' is driving me mad.
If there's a function I need to comment out in the code, I'm OK to do it. Just please, drop me a hint, I'm desperate.
</rant>.

Answer 1

In addition to ensuring all your mail accounts have diabled the adaptive junk mail filtering, make sure you have also turned off adaptive junk mail controls in Local Folders > Junk Settings as well as the mail accounts.
'''re:'I can't 'empty Junk' folder as it contains valuable data ''''
I was under the impression that disabling the adaptive junk controls, stopped this filtering/checking on new incoming mail although it would not change anything currently marked as junk.
However, I'm not certain, but if there are emails marked as junk could this keep the junk settings alive? hence why I suggested you deleted/emptied the Junk and compacted that folder to rule that notion out.
Perhaps it might a good idea to put valuable emails in a suitable folder. I would not assume that a Junk folder is the best place for emails that are not Junk. Then you can clear this folder which has emails marked as junk.
when you have no emails marked as junk and the Junk folder is empty and compacted, then make sure the training.dat is empty.
'''re: $ find ~/.thunderbird -name training.dat --- returns no files. '''
If you have clicked on 'Reset Training Data' it should clear everything, but check that it is totally empty and you must have Thunderbird closed before you do any changes to the Profile folder.
Profile folders and files are hidden files, so you need to make hidden files visible first.
Select the thunderbird file and press Ctrl-H.
more info :
http://www.upubuntu.com/2011/11/how-to-show-create-hidden-files-or.html
Then when you start up Thunderbird, the Junk Controls should be completely disabled.
Just had a thought....do you have any pop mail account set up as a Global Inbox account?
If yes, disable this temporarily (set to store inside own Inbox) and then unset your Junk settings. There was a bug requiring this workaround, but it was fixed from version 17.
Close and restart Thunderbird after changing all the settings.
RE: Junk controls.
I set up my Junk controls, trained the Junk to recognise junk and not junk and have not had any issues. From my point of view it works very well.
re: To Disable or enable Thunderbird's email scam detection and warning system
'Tools' > 'Options' > 'Security' > E-mail Scams tab.
Uncheck/check the box and click on OK.
You could try creating a new Profile and make sure that all the Junk Settings are not enabled from the start.
If switching off absolutely everything in all accounts, Local Folders etc still brings up the warning. please post as a bug here:
https://bugzilla.mozilla.org/