Hello Marketo!
So pretty simple and much needed feature. The ability to control the amount of emails sent per campaign on a time scale.
So Campaign A is going to go out to 40k customers. Thats alot and should have some kind of throttle control especially if its a new ip. So an option in the scheduling or sending tab that would say send X amout of emails over X amount of time, or Send 5k emails ever 30 mins as an example..
I was kinda shocked this wasnt there in your app already since its very crucial. Dare I say your competitor already has this 🙂
I have faith Marketo, make things like this happen!