Anyone know of a decent ESP that can handle over 3M emails/day (can't be stingy with affiliate links).
I don't know much about your goals or situation (eg. where your list came from). It might be worth your while running up a couple of SMTP servers on some platform that has relatively clean IPs (eg. DO) and forwarding mail destined for problem ISPs (hotmail, yahoo, at&t, etc..) to an ESP like SES, SG, etc..
That's what I do (for reasons other than scale), it both reduces costs and puts you more in control of the whole platform...