I am the founder of http://critsend.com http://critsend.com, we make your email ends up into its appropriate inbox. We have a special offer for EC2 customers,

I am the founder of http://critsend.com http://critsend.com, we make your email ends up into its appropriate inbox. We have a special offer for EC2 customers, we have some servers directly at AWS so latency is low and bandwidth is free for them. We are currently in closed beta but if you subscribe and add say you saw us on Hacker News, we will send you an invite asap. Our first 1,000 emails are free and after that we are pay per use.