How can I test SURBL is working

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Hi,

I have
1) [EMAIL PROTECTED] ~]# rpm -q caching-nameserver
                              caching-nameserver-7.3-3

2) Net::DNS is up to date.

3) /usr/bin/perl -T -w /usr/bin/spamd -L -x -u vpopmail

Running on FC4 with SpamAssassin 3.10, init.pre has

loadplugin Mail::SpamAssassin::Plugin::URIDNSBL

How do i test SA is running with SURBL. I dont see any hit on any email 
since the day(6 months now) i had installed SA.

Best regards