Exch2k13 - RBL - can we use or not?

Hi,

can someone explain if after apply spk1 an CU5, can we use RBL filter??

I´m confused after read these articles:



How to configure an IP Block List Provider like zen.spamhaus.org in Exchange 2013 RTM?
http://social.technet.microsoft.com/Forums/exchange/en-US/655d9baf-97f5-4a9d-aa89-b922aacfe02f/how-to-configure-an-ip-block-list-provider-like-zenspamhausorg-in-exchange-2013-rtm?forum=exchangesvrsecuremessaging

RBL and Exchange 2013
http://anewmessagehasarrived.blogspot.com.br/2013/05/rbl-and-exchange-2013.html

tks,

Renato P