Hi - very new to learning Marketo but I'm the only one who can use this platform at my office. We have a list of 150k-200k prospects and want to them them all the same email but stay within the 20k rule for sending. How can we do this? I set up 7 Send smart campaigns with about 12 different filters but it took a very long time and doesn't seem sustainable doing this weekly since some things (mostly US States chosen) will change. What's the most efficient way to make a smaller group size? They are spread across the US.