http://www.barracudacentral.org/rbl
(2) Test your query with command
host 2.0.0.127.b.barracudacentral.org
(3) edit file spam.lists.conf inside directory /etc/MailScanner and add one line something like this.
barracudacentral.org b.barracudacentral.org
(4) edit MailScanner.conf inside directory /etc/MailScanner and edit to add
Spam List = barracudacentral.org spamhaus-ZEN NJABL spamcop.net
(5) Restart your MailScanner and check your log for email detect as spam for something like this.
Jan 19 10:05:55 t2-mail MailScanner[3875]: Message 501D44A80EB.0E08B from 120.138.82.130 ([email protected]) to lists.oscc.org.my is spam, barracudacentral.org, spamhaus-ZEN, SpamAssassin (not cached, score=11.317, required 6,