Testing out a particular inbox that seems to have some spam limitations on the volume of emails can get through for that one email domain/company. We have pared down the size of lists and want to do a staggered send to test the inbox - anyone have insight or advice on how much time via a wait step we could leave in between each send? 1 hour, 2 hours, more, etc?
This isn't something that has a single answer. It depends on what their throttle actually is — is it per-hour or per-day (it's unlikely to be some random number of hours like per-7-hours).
You can start with every 12 hours and then trim down until you trigger the limitation again.