Disable automatic updating of email addresses based on email policy
Junk Settings for the mail account: See image below as aid.
There is a section: 'do not automatically mark mail as junk if the sender is in' It should show you a list of your address books. Any contacts in a selected address book will not be auto marked as Junk. Destination and Retention: Select ' Move new junk messages to' If Pop mail account choose: ' Junk folder on' and select the mail account name.
The button ' Global Junk Preferences' is a shortcut to: ' Tools' ' Junk' tab This is where you set your default junk mail settings.This is where you set the Account specific Junk Mail settings.Select to enable adaptive junk mail controls for the mail account.If you want to clear the data collected and used for Junk Mail controls and reset the training data, click on button ' Reset Training Data'.Click on OK to close and save Options Click on OK to close and save Account Settings. I had not realize there was a Junk setting per account.