我安装SpamAssassin时老是提示我以下几个module out of date

REQUIRED module out of date: Net::DNS
optional module out of date: Mail::SPF::Query
optional module missing: Razor2
optional module out of date: IO::Socket::INET6
optional module out of date: Compress::Zlib

但是我都已经下载了最新版本安装了

cd /root
perl -MCPAN -e shell
Are you ready for manual configuration? [yes] n
cpan> o conf prerequisites_policy ask
cpan> install Digest::SHA1
cpan> install HTML::Parser
cpan> install Net::DNS
cpan> install IO::Zlib
cpan> install Archive::Tar
cpan> install Mail::SpamAssassin
cpan> quit