rblcheck: udns-rblcheck 0.7 (udns library version 0.7).
Usage is: rblcheck [options] address..
Where options are:
 -h - print this help and exit
 -s service - add the service (DNSBL zone) to the serice list
 -S service-file - add the DNSBL zone(s) read from the given file
 -c - clear service list
 -v - increase verbosity level (more -vs => more verbose)
 -q - decrease verbosity level (opposite of -v)
 -t - obtain and print TXT records if any
 -m - stop checking after first address match in any list
 -n ipaddr - use the given nameserver instead of the default
(if no -s or -S option is given, use $RBLCHECK_ZONES, ~/.rblcheckrc
or /etc/rblcheckrc in that order)