Finding important emails in a strange outlook folder called "Unwanted"? This is a problem with mail being setup on Samsung/Android phones.
Here's the fix:
Now the user can move the messages out of the Unwanted Folder and delete that folder, and email will stop being filtered improperly.
NOTE: If your device is connected to a corporate Exchange/Office 365 account, I would disable the SPAM filter on the phone completely, and let Exchange handle the spam filtering; since it seems that the built-in feature is more of a nuisance than helpful.