How to verify MS is using the RBL

[Wayne Franz-com]

First post.
Is there a way to determine if MailScanner is actually using the RBL's
I have currently added to the MailScanner.conf

Spam List Definitions = %etc-dir%/spam.lists.conf
Spam List = barracuda spamcop.net spamhaus-ZEN

The spam.list.conf contains
spamhaus.org                    sbl.spamhaus.org.
spamhaus-XBL                    xbl.spamhaus.org.
spamhaus-PBL                    pbl.spamhaus.org.
spamhaus-ZEN                    zen.spamhaus.org.
SBL+XBL                         sbl-xbl.spamhaus.org.
spamcop.net                     bl.spamcop.net.
NJABL                           dnsbl.njabl.org.
barracuda                       b.barracudacentrail.org

However, email that do not pass one of the RBL (barracuda) still come through undetected.
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