Outlook has a rules wizard that will allow you to filter, move or remove emails of a specific definition.
http://officetwoten.blogspot.com/200...010-rules.html
http://www.byteblocks.com/post/2009/...look-2010.aspx
This should get you an idea as to what to do but in the end, you will need to create a custom rule. Start with a blank rule and add the parameters as you go using the wizard. Once you do that, run your rules and the system should start to filter as desired. I would recommend a move to a folder first to separate your mail before you delete. In the end, it is your choice.