Amazon's SQS with SES - http://bit.ly/M5f8DF

node_send.coffee

aws = require ('aws-lib')

access_key_id = "<Your access key id>"
secret_access_key = "<Your secret access key>"

options = {
  "path" : "<Your queue URL, just the /accountid/queue_name is needed>"  
}

sqs = aws.createSQSClient(access_key_id, secret_access_key, options)

outbound = {
  MessageBody : JSON.stringify({ 
    email: "email@example.com", 
    data: "This is a test msg!"
    })  
}

sqs.call "SendMessage", outbound, (err, result) ->
  if err then console.log "SendMessage error: #{err}"

ruby_receive.rb

require 'rubygems'
require 'aws-sdk'
require 'json'

AWS.config(
  :access_key_id => "<Your access key id>",
  :secret_access_key => "<Your secret access key>")

ses = AWS::SimpleEmailService.new
sqs = AWS::SQS.new

url = "<Your queue URL>"

while true
   puts "Checking queue for new work"
   receive = sqs.queues[url].receive_message()
   if receive
     message = JSON.parse(receive.body)
     puts message
     ses.send_email(
       :subject => "A Sample Email",
       :from => "email@example.com'",
       :to => message['email'],
       :body_text => message['data'],
       :body_html => "<p>#{message['data']}</p>")
     receive.delete
   else
     puts "Sleeping"
     sleep 5
   end
end