To install Net::Server::Mail::ESMTP::STARTTLS, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Net::Server::Mail::ESMTP::STARTTLS

CPAN shell

perl -MCPAN -e shell
install Net::Server::Mail::ESMTP::STARTTLS

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