mailer.rb

# Stolen from http://snippets.dzone.com/posts/show/6621 (for me to remember)

# for this example the folder structure should be as follow
# 
# --+ mailer
#   |-- image.jpg
#   |-- mailer.rb (this file)
#   |--+ notifier
#      |-- email.rhtml

require 'rubygems'
require 'action_mailer'

class Notifier < ActionMailer::Base
  def email()
    recipients "receiver@domain.com"
    from       "sender@anotherdomain.com"
    subject    "Subject"
    content_type "multipart/alternative"
    
    body = { :first_name => "John", :last_name => "Doe"}
    part :content_type => "text/plain", :body => render_message('email', body)
    attachment :content_type => "image/jpeg", :body => File.read("image.jpg")
  end
end

Notifier.template_root = File.dirname(__FILE__)

Notifier.smtp_settings = {
  :address  => "smtp.mailserver.com",
  :port  => 25, 
  :user_name  => "sender@anotherdomain.com",
  :password  => "password",
  :authentication  => :login
}

Notifier.deliver_email