The Microsoft Outlook 2013 junk email or spam feature moves incoming messages which appear to be junk mail into a special junk folder. If you’re already using an email service that already filters Junk Email / SPAM, some prefer to disable the Outlook Junk Email feature. Here’s how to do it.
Open Outlook, Click the Home Tab and Click Junk.
From the Drop-Down, Click Junk E-mail Options.
Click the bullet No Automatic Filtering.
Click OK to save the settings change and that’s it!