Step 1- Get into the Junk E-mail folder.
Step 2- Select the email which you want to make as Not Junk.
Sten 3- Go to the Home tab, click Junk > Not Junk. See screenshot:
Step 4- After clicking Not Junk, a Mark as Not Junk dialog box will pop up, please check the Always trust e-mail from “someone@xxx.com” box, and then click OK button.
Then the email will be moved to the original folder. And from now on, all emails sent from this sender will not be filtered to the junk email folder anymore.