send numbered emails to mailtrap

gistfile1.rb

require 'net/smtp'

(0..9).each do |i|
  message = <<-END.split("\n").map!(&:strip).join("\n")
  From: Private Person <me@fromdomain.com>
  To: A Test User <test@todomain.com>
  Subject: #{i} message

  This is a test e-mail message.
  END

  Net::SMTP.start('localhost',
                  2525,
                  'localhost',
                  'erhqa', 'eae1d9f3ec043840', :plain) do |smtp|
    smtp.send_message message, 'me@fromdomain.com',
                               'test@todomain.com'
  end
end