gistfile1.rb

class MySMTP
  HOST = 'mail.x.com'
  PORT = 25
  HELO = 'x.com'

  def self.compose_mail(recipients, from, subject, body)
    recipients = [recipients] if !recipients.kind_of?(Array)
    ["From: <#{from}>",
     "To: " + recipients.map { |r| "<#{r}>" }.join(', '),
     "Subject: #{subject}",
    ].join("\n") << "\n\n" << body << "\n"
  end

  def self.smtp_full(recipients, from, subject, body)
    recipients = [recipients] if !recipients.kind_of?(Array)
    Net::SMTP.start(HOST, PORT, HELO) { |agent|
      agent.send_message(compose_mail(recipients, from, subject, body),
                         from, recipients)
    }
  end
end