You can automatically create an Outlook contact for anyone who sends you a message. After you add a sender to your Outlook contacts, Outlook does not classify future messages from that sender as junk mail.
In the message list, click the message.
Tip: If the message is part of a conversation, expand the conversation, and then select the message that you want.
On the Message menu, point to Sender, and then select Add to People.
On the Contact tab, select Save.
Note: Outlook saves any information about the sender that is stored in the Exchange Global Address List (GAL), such as company name, job title, department, telephone number, and email address.