Channel: Email Set to "warmup" to send this as an Auto Warm Up campaign: a single campaign delivered gradually to your audience over several days, so you don’t have to pace sends manually. OneSignal generates a sending schedule based on your past delivery volumes, scheduled Auto Warm Up emails, and the size of your current audience. When set, email_warm_up is required and describes the campaign’s stages and (optionally) its scheduling strategy. send_after cannot be combined with kind: \"warmup\". The campaign will be scheduled to begin at its first stage’s start time. Only supported for Email notifications.