What kind of security implemention kolab server use?

[Rodrigo de Oliveira Gomes]

Helo lists.

   I have a doubt... What kind of security implemention does kolab 
server 2.0.4 use to drop the spam traffic?

   Example: SPF, greylist, RBLs, Spamassassin and others?

   Thanks

Att

Rodrigo Gomes