rbl and timeout

[Alessandro Dentella]

Hi again,

  and now the questions related to rbl and dns. 

  At the moment I'm using bind9 on the mail server (on debian). Is that a
  casching nameserver, is there a way to test if it is working correctly?

  I'm confused as for how rbldnsd should get into the setup. After I set it
  up should I substitute it to bind? should I declare it in MailScanner.conf
  / spamassassin?

  TIA
  %-\