Smtp-tls is a project mainly written in Ruby, it's free.
A ruby gem to enable TLS for Net::SMTP
= SMTP-TLS
I didn't author this, so I can't make any claims about it's worth, licensing, or anything else. It's just a gem package for some code that's been floating around for a few years. Check google, or the following for more information:
== Ruby on Rails
If you're using Ruby on Rails >= 2.2 and Ruby v1.8.7 or greater, you {don't need this}[http://github.com/rails/rails/commit/732c724df61bc8b780dc42817625b25a321908e4]. Just set +enable_starttls_auto+ in your +ActionMailer+ config:
ActionMailer::Base.smtp_settings = { :enable_starttls_auto => true, :address => 'smtp.gmail.com', :port => 587, :domain => 'example.com', :authentication => :plain, :user_name => 'user', :password => 'secret' }
== Dependencies
== Usage
require 'smtp-tls'
Then get back to business as usual.