No one likes spam or junk email. The Outlook 2016 for Mac Junk Email Filter doesn't stop delivery of junk email messages, but does the next best thing --- it moves suspected spam to the Junk Email folder. We recommend you regularly review messages in the Junk Email folder to check for legitimate messages that were incorrectly classified as junk. If you find a message that isn't junk, drag it back to the Inbox or any folder.
When the filter finds a message that appears to be junk, Outlook does the following: