This is Perl module Net::POP3::SSLWrapper.

INSTALLATION

Net::POP3::SSLWrapper installation is straightforward. If your CPAN shell is set up,
you should just be able to do

   % cpan Net::POP3::SSLWrapper

Download it, unpack it, then build it as per the usual:

   % perl Makefile.PL
   % make && make test

Then install it:

   % make install

DOCUMENTATION

Net::POP3::SSLWrapper documentation is available as in POD. So you can do:

   % perldoc Net::POP3::SSLWrapper

to read the documentation online with your favorite pager.

tokuhirom