No POD found for Makefile.PL. Time to read the source?
Makefile.PL
To install Mail::SSLSigCheck, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Mail::SSLSigCheck
CPAN shell
perl -MCPAN -e shell install Mail::SSLSigCheck
For more information on module installation, please visit the detailed CPAN module installation guide.