Rename rpmforge.repo to rpmforge.nonrepo in /etc/yum.repos.d/ and then running 'yum clean up' before perl components install.
For minimize conflict, only centos.repo dan kloxo-mr.repo in your system.
That it.
I don't fully understand what you mean, I have renamed rpmforge.repo to rpmforge.nonrepo and than 'yum clean all' followed by 'yum update' , than I did what you said on othe post but didn't work :
# yum perl-Mail-DKIM-Signer perl-Mail-DKIM-TextWrap perl-Getopt-Long perl-Pod-Usage
Loaded plugins: fastestmirror, priorities, protectbase, replace
No such command: perl-Mail-DKIM-Signer. Please use /usr/bin/yum --help
I also don't undestand what you meant with
For minimize conflict, only centos.repo dan kloxo-mr.repo in your system.
that's inside yum.repos.d