@Canapin first that’s an amazing handle…but your response is even more amazing! This is really right along the lines of what we want to do. Some more detail.
We have 3.5 million users. We do not plan to send to all of them at once, the idea would be to run this script, maybe for batches of 10k, then stop for a few days, see what kinda of activity we have, check email reputation, and then start again, and so on.
We would like to send this though from an admin with a profile rather than ‘system’, I assume that’s possible?
Again, thanks so much, very very helpful.