IMAP Mail Receive Ruby

contato_mailer.rb

#encoding: utf-8
class ContatoMailer < ActionMailer::Base
  def receive(message)
    p message
  end
end

mail_receive.rb

# default rails environment to development
ENV['RAILS_ENV'] ||= 'development'

require File.expand_path(File.dirname(__FILE__) + "/config/environment")
require 'net/imap'
require 'net/http'

config = YAML.load(File.read(File.join(RAILS_ROOT, 'config', 'mail_receiver.yml')))
config = config[RAILS_ENV].to_options
sleep_time = config.delete(:sleep_time)
# this script will continue running forever
loop do
  begin
    # make a connection to imap account
    imap = Net::IMAP.new(config[:host], config[:port], true)
    imap.login(config[:username], config[:password])
    # select inbox as our mailbox to process
    imap.select('Inbox')
    
    # get all emails that are in inbox that have not been deleted
    imap.uid_search(["NOT", "DELETED"]).each do |uid|
      # fetches the straight up source of the email for tmail to parse
      source   = imap.uid_fetch(uid, ['RFC822']).first.attr['RFC822']

      # Location#new_from_email accepts the source and creates new location
      contact = ContatoMailer.receive(source)
      
      # there isn't move in imap so we copy to new mailbox and then delete from inbox
      #imap.uid_copy(uid, "[Gmail]/All Mail")
      imap.uid_store(uid, "+FLAGS", [:Deleted])
    end
    
    # expunge removes the deleted emails
    imap.expunge
    imap.logout
    imap.disconnect

  # NoResponseError and ByResponseError happen often when imap'ing
  rescue Net::IMAP::NoResponseError => e
    puts "No Response Error: #{e}"   
    # send to log file, db, or email
  rescue Net::IMAP::ByeResponseError => e
    puts "Bye Response Error: #{e}"    
    # send to log file, db, or email
  rescue => e
    puts "Fatal Error: #{e}"   
    # send to log file, db, or email
  end
  
  sleep(sleep_time)
end

mail_receiver.yml

development:
  host: "imap.gmail.com"
  port: 993
  username: "username@gmail.com"
  password: "password"
  sleep_time: 10

won't work if your INBOX is HUGE.