How to filter Spam to the Deleted Items folder in Outlook:
Locate the email from the person that you want to filter out.
Click on it once to highlight it.
On the toolbar, click on the Organize button.
The email address of the person who was selected in Step 1 will appear in the "Create a rule" portion of the window.
In the "Create a rule to move new messages" drop-down menu, select from.
Under "Create a rule," select Deleted Items from the lowest drop-down menu.
Click on the Create button.
Outlook may display a window asking if you would like to apply this rule to the current folder you are in. Click Yes.
Click on the X in the upper right-hand corner to close the Organize window.
This rule will now apply to all email from this subject.