Notify User that scheduled emails are sent to all participants displayed at the time of sending
There is a bug that I should have seen coming. I used a filter to select certain participants to schedule an email. Everything worked as normal, I saw "SCHEDULED" come up in the merge status. Then I selected all participants with the filter (IE unfiltered), and to my surprise the email was sent to every one of my participants - which wasn't good. As I say, I probably should have seen this coming, but a notification / statement of what would happen would have prevented this issue. I was also led on by the fact that the "SCHEDULED" merge status still only applied to the few participants I intended on emailing.