Mail::Summary::Tools::ThreadFilter::Util -
use Mail::Summary::Tools::ThreadFilter::Util;
To install Mail::Summary::Tools, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Mail::Summary::Tools
CPAN shell
perl -MCPAN -e shell install Mail::Summary::Tools
For more information on module installation, please visit the detailed CPAN module installation guide.