exchange 2007 Edge transport

Hello,

I would like if the Edge transport has option for update is black list for detect domain or send are considered spammer by the security groups web site?

I would like also make a compare with solution I have now for anti spam. I have Surfcontrol mail filter Version 5 The Company was bought By Websense.

My license it about to expire in 2 months I will install exchange 2007 in less than month that why I would like know if i should go with Edge transport or I should renew my license for Surfcontrol

Thank