How do I stop Engage emails sending after activating an automation or broadcast?

After activating an automation or broadcast, we'll start sending emails immediately. From the automation/broadcast's report page, you can see the number of emails sent and the number of emails to send.

If however you decide that you want to stop emails sending, you can stop the automation or broadcast. 

As soon as you click stop, we'll stop sending further emails, even if there are a number of emails set to 'send now'.