Filtering Spam in Outlook 2007

To turn on Junk Email filtering in Outlook 2007

While viewing your inbox, open the Actions menu and select Junk Email->Junk Email Options...
On the Options tab, select a level of junk email protection.

While viewing your inbox or one of your email folders, right-click on the message you wish to mark.
On the menu that appears, select Junk E-Mail, then click Add Sender to Blocked Senders List
From this menu, you can also add the sender or the sender's domain to a safe list that will always be delivered.

While you are viewing your inbox, open the Tools menu and select Rules and Alerts.
When the Rules and Alerts pane opens, select New Rule.
Select a template for your rule, then click Next
Select conditions to judge emails on, then click Next.
Select actions to be taken if an email meets your chosen conditions, then click Next.
Select exceptions such as safe senders which will not be affected by the rule, then click Next.
Specify a name for your rule, and click Finish.