If you are using the free outlook.com then you will have to right-click on the emails you wish to receive and then mark them as not spam.
If you are using Office 365, perform the following.
1. Click the gear icon image on the top right corner and then click Mail under “Your Apps Settings” section.
2. At the left pane expand Accounts and select Block or Allow.
3. At the right pane, select Don’t move email to my junk Email folder and then click Save. *