We wanted to Build a Setup to send more than 5,00,000 emails/day, Currently we have setup Interspire on Cloud with Exim as MTA. We want to tune the MTA to increase Throughput and Increase mailbox Delivery and need your sound advise and improving & scaling the solution. Kindly, let me know whether you would be available for this task? We are running very tight on budget so we will go for fixed cost. We need the list of things that you can do the improve the Performance & Delivery. If possible we can have a talk on skype. Thanks.