[Techtalk] block spam

[kansas_kennedy at phreaker.net]

I'm using k-mail and getting spam from a particular domain for about two 
months now. I tried to filter _any header_  equals email address with filter 
action >> bounce and apply filter on incoming messages. But kmail could not 
be able to do anything....& after setting this filter I received two more 
mails from that domain.

Now, I want to block anything and everything from that particular domain 
coming to my machine through K-mail and instead, if possible, bouce that mail 
back to the root at thatdomain with the full header.

Anyone knows how can I do this?