gistfile1.rb

# put this in /lib/resque.rb

require 'mail'

module Emailer

  class Send
    @queue = :issue_mailer

    def self.perform(addressee, subject, body)

      Mail.defaults do
        delivery_method :smtp, {
          :address              => "smtp.gmail.com",
          :port                 => 587,
          :domain               => '***',
          :user_name            => '***',
          :password             => '***',
          :authentication       => 'plain',
          :enable_starttls_auto => true
        }
      end

      mail = Mail.new do
        from            "***"
        to              addressee
        subject         subject
        content_type    "text/html; charset=UTF-8"
        body            body
      end

      mail.deliver!

    end
  end
end


# then call asynchronously from controller via: 
Resque.enqueue(Emailer::Send, addressee, subject, body)