Follow the steps below to set up a filter in Microsft Outlook to capture mail flagged as spam by SpamAssassin.

1. Make sure the Inbox is active. You can do this by clicking the Inbox icon.
2. Select Tools > Rules and Alerts from the menu and click the New Rule… button.
3. Make sure the Start creating a rule from template radio button is marked.
4. Select Move messages with specific words in the subject to a folder and click Next.
5. Clear the check box with specific words in the subject and select the condition with specific words in the message header.
6. In the Rules description panel, click specific words.
7. In the Search Text dialog box, specify a word or phrase to search for in the message header: (e.g. X-Spam-Status: Yes). Click the Add button then OK button to return to the Rule Wizard dialog box.
8. In the Rule Description panel, click specified to select a folder for the messages.
9. Select the Junk E-mail or Deleted Items folder as the destination for the filtered messages, then click OK (to create a new folder, click the New button and enter a name for the folder).
10. Click Finish, and then OK.