DNSBL - Configuratoin

Hello,

I have a fortimail 60D and i have a question regarding the configuration of DNSBL. I put in there another two black list one from barracuda: "b.barracudacentral.org" and another from spamhause: "sbl.spamhaus.org". the problem is that i got a lot of spams received and when i verify the ip address from email header of the spam is listed in a least 10 black list in mxtoolbox.com, including barracuda and spamhause.

Can you tell me if i have to do another settings in fortimail?

Thank you!