Hi Rakesh,
Well i cannot help much in your problem apart from saying what Jeff had said earlier, that you need to upgrade some of your Perl modules.
the problem is that I run on a Debian 3.0 system that has older Perl modules. :-)
you should upgrade Net::DNS. it won't hurt anything and it will make your RBL checks work. on my system, i ran some statistics, and the SURBL checks are responsible for catching 90% of the spam.
perl -MCPAN -e 'install Net::DNS'
