Select the Home tab.
In the Delete group, click the Junk button.
From the drop-down list, select Junk E-mail Options….
Select the Safe Senders tab.
For each sender you want to whitelist:
Click the Add… button.
In the Enter an e-mail address or Internet domain name to be added to the list. text box, type the e-mail address of the person you want to whitelist.
If not already checked, place a check in the Also trust e-mail from my Contacts check box.