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 click Add to People.
On the Contact tab, click Save & Close.
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.