I am in need of a reliable bulk email server/service that will not ban me for complaints or bounces. I have several million compliant opt-in addresses and need to send to anywhere from 100 to 1 million per day. I am not overly concerned with delivery or inboxing, just want to be able to send. Delivery would be nice of course. Would prefer my own VPS / server that is a one time cost and not ongoing fee. Also I would like to be able to spin another one up easily if one gets blocked. Thanks!