Do you know good fast email/smtp server?

First this is my first post so am not sure if its the right place to post my request or not but here i go...

I have some software connected to good speed server that helps me out sending my email campaigns, its current speed is 200-400 Thousands email per hour, however am looking for something faster, can you guys help me out how to achive 700K-900K email per hour without getting ISP`s down?

Please refer to this post for references:
[CFMX 6.1 has a totally new mail system that can send over 1 million email per hour. No kidding. And it supports multipart messages, multipart attachements, etc. You can do anything with it now, so think about upgrading to 6.1 as an option.]
BY kiteless Moderator

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Thanks

PS: i can pay if requested to get the expected results!