You can use a Mail Filter in Outlook to keep mail from undesired senders out of your Inbox even if it doesn't get classified as Spam. For more information, please see http://mxtoolbox.com/cs/forums/808/ShowThread.aspx
To create a Blocked Senders Filter
1) Click on Tools -> Rules and Alerts
2) Click on New Rule..
3) Start from a blank rule, Check messages when they arrive, Next
4) Check "with specific words in the senders address", then click on "specific words" in the bottom window
5) Put the domain you want blocked, such as "domain.com" and Click Add
6) Click OK
7) Click Next
8) Check "move it to the specified folder", click on "specified" in the bottom window
9) Next
10) Next
11) Type a name for your rule, we recommend "Blocked Senders"
12) Finish
If you already have a Blocked Senders rule, when you need to add another domain to it
1) Click on Tools -> Rules and Alerts
2) Click on "Blocked Senders"
3) Click on the underlined list of domains already in the filter
4) Put the domain you want blocked, such as "domain.com" and Click Add
5) OK
6) OK
Peter
Product Development Engineer
peter@MXToolBox.com
512-637-8762