You can either stop a sendout while it’s still “Scheduled”, or when it has status “In queue” or “Sending”.

If you discover a typo, a pricing error, or something else in a message that already has status “In queue” or “Sending”, you can cancel the sendout. Please note that this action will not revoke messages that have already been sent but only prevent any remaining messages from being dispatched. Consider it an emergency function.