Send secure mail with Ruby mail

ruby_mail.rb

# Make sure the mail gem is available first:
# gem install mail

require 'mail'
Mail.defaults do
  delivery_method :smtp, {
    :port      => 465, # Change this if your provider requires a different port for SSL
    :address   => "<yourSMTPServer>",
    :user_name => "<yourUserName>",
    :password  => "<yourPassword>",
    :authentication         => :plain,
    # The secure options are set below
    :enable_starttls_auto   => true,
    :openssl_verify_mode    => "none",
    :ssl                    => true, 
    :tls                    => true
  }
end

mail = Mail.deliver do
  # Set your to and from addresses for the mail here
  to      'recipent@example.com'
  from    'Sender Name <sendername@example.com>' 
  subject 'An email test!'

  # The plain text version of your email
  text_part do
    body 'A test email in plaintext'
  end

  # The 'full-fat' HTML email version
  html_part do
    content_type 'text/html; charset=UTF-8'
    body '<h1>A test email</h1><p>In HTML...</p>'
  end
 end