you mean via the message system?
You can either filter out the spam messages or you can disable messing altogether (or restrict to just firends).
Under "Security" in options, add the spam keywords to your filter, ie.
Code: |
Your client has an infinite queue|Your client is connecting too fast|fastest download speed|zambor2|magno|zambor|FX|DI-emule|Karolina|AUTOMATED MESSAGE|Your client |
Each blocked message seperated by |