In my research for a big client, I've been recommended to see OpenEMM as a self hosted solution. I'm fairly experienced windows and Linux Sysadmin, but not have much experience in bulk Email Marketing. I do thoroughly know the Deliverablity and other management and the usual setup stuff like rDNS/SPF/DKIM etc.
Using ESP is out of budget, so I'm trying to make my own solution... (I know its tough but I'm on it). The 1.5 Million subscriber's Mailing list is verified and thorough. I want proper tracking of Delivery, inboxing, open and click monitoring. I'd be sending between 3M to 5M mails a month, and there are couple of thousand transactional mails as well.
I'm looking at some commercial solutions like PowerMTA and Green Arrow but their prices are exorbitant.
Can the elders here suggest if I'll be able to send @ a rate of 15 to 20,000 mails per hour speed from OpenEMM ?
Any other suggestions and pointers are appreciated.