[Mailman-Users] Help!! Spam Flood!

[Donald J. Organ IV]

So I seem to be getting flooded with spam being send to liphp-dev-owner at lists.liphp.org , and it seems to have the on behalf of .... in there.  Is there a way to stop this.  I get a couple hundred if not maybe a couple of 1,000 spam messages a day.

Now I am the owner of the list so I guess email sent to that address should come to me but isnt there a way to stop the spam?