syntax for tcprulescheck

I have consulted the several websites trying to determine the syntax
for tcprulescheck

# tcprulescheck /mnt/na1/etc/tcp.smtp.cdb
rule :
deny connection

[root@nymail1 ~]# strings /mnt/na1/etc/tcp.smtp.cdb | head -3
66.111.4.254+RELAYCLIENT=
+RCPTCHECK=
166.137.133.20+RELAYCLIENT=

We are using pop-before-smtp. Being able to dump the cdb file would be
very helpful in debugging. Does anyone know how to make this work or a
better program?

Thank you