To install POE::Component::Server::POP3::Constants, simply copy and paste either of the commands in to your terminal

cpanm

                    cpanm POE::Component::Server::POP3::Constants

CPAN shell

                    perl -MCPAN -e shell
                    install POE::Component::Server::POP3::Constants

For more information on module installation please visit the detailed CPAN module installation guide.