Hey guys I use a service www.readnotify.com. I pay them to deliver and track my messages in bulk. To use their service, I just need to specify with them which email address the message is coming from (so they add it to their approval list) and then any emails coming from that address I just add .readnotify.com, and they are routed through readnotify and seem to have some of the best deliverability and open rates I've ever seen. So essentially I just need a way to relay messages to this service in bulk. I was using my bluehost email at 2k emails an hour but just sending that amount raises a red flag in their system and they automatically shut you off.