>>>>> "D" == David Ross <dross / code-exec.net> writes:

D> Yes, it will  part of a solution,

 Associate it with another test (captcha, or what you want)

 * positive response from a majority of RBL, the user need to pass a test
   (captcha, ..)

 * otherwise he is accepted

D> the other part is having something scan the host for known 
D> ports.

 This is not the purpose of xbl.spamhaus.org (exploits block list) to
 detect such hosts ?


Guy Decoux