Automatically extend the list of safe senders(Outlook 2003, 2007, 2010)

               When you write a message to a person, Outlook should enter this recipient automatically in the list of safe senders in order to relieve them of the maintenance of this list.

               You can direct Outlook to gather all the recipients of your message in the list of a certain sender. For this, go to "Tools | options" in the 2003, 2007 version. Under the “Preference” tab click on “Junk e-mail”. In case of Outlook 2010, mark the “Junk e-mail” folder in the navigation bar on the left side of the application. Click a received message classified as junk-e-mail and open the command “Junk e-mail | Junk e-mail options” in the context menu.
                 In both the versions, select the "Safe Sender" tab and check the box next to “Automatically add people I e-mail to the safe sender list" and confirm your selection with “OK”.