pagerduty-imap.rb

#!/usr/bin/env ruby
require 'mailman'

class ErrorLoggingMiddleware
  def call(mail)
    begin
      yield
    rescue
      puts "There was an error processing this message! #{mail.subject}"
      raise
    end
  end
end

Mailman.config.middleware.add ErrorLoggingMiddleware

Mailman.config.poll_interval = 10
Mailman.config.imap = {
  server: 'imap.gmail.com',
  port:   '993',
  ssl:     true,
  username: ENV['EMAIL_ADDRESS'],
  password: ENV['EMAIL_SECRET']
}

Mailman::Application.run do 
  from('[email protected]').subject(/PagerDuty ALERT/) do
    `open ~/Downloads/pagerduty.mp3`
  end
end