Provides SMTP STARTTLS support for Ruby 1.8.6, this 
functionality is built-in for Ruby 1.8.7+. 

To use simply: require 'smtp_tls' and use the 
Net::SMTP#enable_starttls method to talk to 
servers that use STARTTLS.

WWW: http://seattlerb.rubyforge.org/smtp_tls/